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Finding the Fourth Proportional to 39,400.70, 59,068.65 and 20,932.70

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Solution

The fourth proportional to 39,400.70, 59,068.65 and 20,932.70 is: 31,381.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,400.70 : 59,068.65 = 20,932.70 : x
  2. Step 2: Convert to fraction form
    39,400.70/59,068.65 = 20,932.70/x
  3. Step 3: Cross multiply
    39,400.70x = 59,068.65 × 20,932.70
  4. Step 4: Simplify right side
    39,400.70x = 1,236,466,329.86
  5. Step 5: Solve for x
    x = 1,236,466,329.86/39,400.70
  6. Step 6: Final answer
    x = 31,381.84

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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.