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Finding the Fourth Proportional to 39,636.76, 54,697.50 and 21,731.30

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Solution

The fourth proportional to 39,636.76, 54,697.50 and 21,731.30 is: 29,988.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,636.76 : 54,697.50 = 21,731.30 : x
  2. Step 2: Convert to fraction form
    39,636.76/54,697.50 = 21,731.30/x
  3. Step 3: Cross multiply
    39,636.76x = 54,697.50 × 21,731.30
  4. Step 4: Simplify right side
    39,636.76x = 1,188,647,781.75
  5. Step 5: Solve for x
    x = 1,188,647,781.75/39,636.76
  6. Step 6: Final answer
    x = 29,988.52

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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.