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Finding the Fourth Proportional to 21,242,527,218.90, 31,863,790,828.35 and 21,242,527,218.90

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Solution

The fourth proportional to 21,242,527,218.90, 31,863,790,828.35 and 21,242,527,218.90 is: 31,863,790,828.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,242,527,218.90 : 31,863,790,828.35 = 21,242,527,218.90 : x
  2. Step 2: Convert to fraction form
    21,242,527,218.90/31,863,790,828.35 = 21,242,527,218.90/x
  3. Step 3: Cross multiply
    21,242,527,218.90x = 31,863,790,828.35 × 21,242,527,218.90
  4. Step 4: Simplify right side
    21,242,527,218.90x = 676,867,443,968,561,119,232
  5. Step 5: Solve for x
    x = 676,867,443,968,561,119,232/21,242,527,218.90
  6. Step 6: Final answer
    x = 31,863,790,828.35

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.