Home / 39,219.76-54,123.61-21,314.76

Finding the Fourth Proportional to 39,219.76, 54,123.61 and 21,314.76

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Solution

The fourth proportional to 39,219.76, 54,123.61 and 21,314.76 is: 29,414.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,219.76 : 54,123.61 = 21,314.76 : x
  2. Step 2: Convert to fraction form
    39,219.76/54,123.61 = 21,314.76/x
  3. Step 3: Cross multiply
    39,219.76x = 54,123.61 × 21,314.76
  4. Step 4: Simplify right side
    39,219.76x = 1,153,631,704.20
  5. Step 5: Solve for x
    x = 1,153,631,704.20/39,219.76
  6. Step 6: Final answer
    x = 29,414.55

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Double scale
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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.