Home / 28,981.20-39,990.72-16,232.61

Finding the Fourth Proportional to 28,981.20, 39,990.72 and 16,232.61

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Solution

The fourth proportional to 28,981.20, 39,990.72 and 16,232.61 is: 22,399.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,981.20 : 39,990.72 = 16,232.61 : x
  2. Step 2: Convert to fraction form
    28,981.20/39,990.72 = 16,232.61/x
  3. Step 3: Cross multiply
    28,981.20x = 39,990.72 × 16,232.61
  4. Step 4: Simplify right side
    28,981.20x = 649,153,761.38
  5. Step 5: Solve for x
    x = 649,153,761.38/28,981.20
  6. Step 6: Final answer
    x = 22,399.13

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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.