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Finding the Fourth Proportional to 38,759.76, 58,139.87 and 13,800.78

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Solution

The fourth proportional to 38,759.76, 58,139.87 and 13,800.78 is: 20,701.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,759.76 : 58,139.87 = 13,800.78 : x
  2. Step 2: Convert to fraction form
    38,759.76/58,139.87 = 13,800.78/x
  3. Step 3: Cross multiply
    38,759.76x = 58,139.87 × 13,800.78
  4. Step 4: Simplify right side
    38,759.76x = 802,375,195.40
  5. Step 5: Solve for x
    x = 802,375,195.40/38,759.76
  6. Step 6: Final answer
    x = 20,701.24

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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.