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Finding the Fourth Proportional to 38,287.31, 52,841.24 and 21,520.31

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Solution

The fourth proportional to 38,287.31, 52,841.24 and 21,520.31 is: 29,700.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,287.31 : 52,841.24 = 21,520.31 : x
  2. Step 2: Convert to fraction form
    38,287.31/52,841.24 = 21,520.31/x
  3. Step 3: Cross multiply
    38,287.31x = 52,841.24 × 21,520.31
  4. Step 4: Simplify right side
    38,287.31x = 1,137,159,865.58
  5. Step 5: Solve for x
    x = 1,137,159,865.58/38,287.31
  6. Step 6: Final answer
    x = 29,700.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.