Home / 38,811.60-58,217.40-12,517.20

Finding the Fourth Proportional to 38,811.60, 58,217.40 and 12,517.20

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Solution

The fourth proportional to 38,811.60, 58,217.40 and 12,517.20 is: 18,775.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,811.60 : 58,217.40 = 12,517.20 : x
  2. Step 2: Convert to fraction form
    38,811.60/58,217.40 = 12,517.20/x
  3. Step 3: Cross multiply
    38,811.60x = 58,217.40 × 12,517.20
  4. Step 4: Simplify right side
    38,811.60x = 728,718,839.28
  5. Step 5: Solve for x
    x = 728,718,839.28/38,811.60
  6. Step 6: Final answer
    x = 18,775.80

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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.