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Finding the Fourth Proportional to 21,227,905.80, 31,841,858.70 and 21,227,905.80

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Solution

The fourth proportional to 21,227,905.80, 31,841,858.70 and 21,227,905.80 is: 31,841,858.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,227,905.80 : 31,841,858.70 = 21,227,905.80 : x
  2. Step 2: Convert to fraction form
    21,227,905.80/31,841,858.70 = 21,227,905.80/x
  3. Step 3: Cross multiply
    21,227,905.80x = 31,841,858.70 × 21,227,905.80
  4. Step 4: Simplify right side
    21,227,905.80x = 675,935,976,980,510.50
  5. Step 5: Solve for x
    x = 675,935,976,980,510.50/21,227,905.80
  6. Step 6: Final answer
    x = 31,841,858.70

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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.