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Finding the Fourth Proportional to 20,801,431.20, 31,146,159.60 and 20,801,431.20

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Solution

The fourth proportional to 20,801,431.20, 31,146,159.60 and 20,801,431.20 is: 31,146,159.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,801,431.20 : 31,146,159.60 = 20,801,431.20 : x
  2. Step 2: Convert to fraction form
    20,801,431.20/31,146,159.60 = 20,801,431.20/x
  3. Step 3: Cross multiply
    20,801,431.20x = 31,146,159.60 × 20,801,431.20
  4. Step 4: Simplify right side
    20,801,431.20x = 647,884,696,063,619.50
  5. Step 5: Solve for x
    x = 647,884,696,063,619.50/20,801,431.20
  6. Step 6: Final answer
    x = 31,146,159.60

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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.