Home / 18,861.13-28,264.87-13,891.69

Finding the Fourth Proportional to 18,861.13, 28,264.87 and 13,891.69

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Solution

The fourth proportional to 18,861.13, 28,264.87 and 13,891.69 is: 20,817.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,861.13 : 28,264.87 = 13,891.69 : x
  2. Step 2: Convert to fraction form
    18,861.13/28,264.87 = 13,891.69/x
  3. Step 3: Cross multiply
    18,861.13x = 28,264.87 × 13,891.69
  4. Step 4: Simplify right side
    18,861.13x = 392,646,811.93
  5. Step 5: Solve for x
    x = 392,646,811.93/18,861.13
  6. Step 6: Final answer
    x = 20,817.78

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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.