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Finding the Fourth Proportional to 40,476.78, 60,720.25 and 21,731.05

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Solution

The fourth proportional to 40,476.78, 60,720.25 and 21,731.05 is: 32,599.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,476.78 : 60,720.25 = 21,731.05 : x
  2. Step 2: Convert to fraction form
    40,476.78/60,720.25 = 21,731.05/x
  3. Step 3: Cross multiply
    40,476.78x = 60,720.25 × 21,731.05
  4. Step 4: Simplify right side
    40,476.78x = 1,319,514,691.29
  5. Step 5: Solve for x
    x = 1,319,514,691.29/40,476.78
  6. Step 6: Final answer
    x = 32,599.30

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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.