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Finding the Fourth Proportional to 21,152,405.40, 31,678,841.70 and 21,152,405.40

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Solution

The fourth proportional to 21,152,405.40, 31,678,841.70 and 21,152,405.40 is: 31,678,841.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,152,405.40 : 31,678,841.70 = 21,152,405.40 : x
  2. Step 2: Convert to fraction form
    21,152,405.40/31,678,841.70 = 21,152,405.40/x
  3. Step 3: Cross multiply
    21,152,405.40x = 31,678,841.70 × 21,152,405.40
  4. Step 4: Simplify right side
    21,152,405.40x = 670,083,702,240,825.12
  5. Step 5: Solve for x
    x = 670,083,702,240,825.12/21,152,405.40
  6. Step 6: Final answer
    x = 31,678,841.70

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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.