Home / 18,731.16-28,121.14-12,531

Finding the Fourth Proportional to 18,731.16, 28,121.14 and 12,531

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Solution

The fourth proportional to 18,731.16, 28,121.14 and 12,531 is: 18,812.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,731.16 : 28,121.14 = 12,531 : x
  2. Step 2: Convert to fraction form
    18,731.16/28,121.14 = 12,531/x
  3. Step 3: Cross multiply
    18,731.16x = 28,121.14 × 12,531
  4. Step 4: Simplify right side
    18,731.16x = 352,386,005.34
  5. Step 5: Solve for x
    x = 352,386,005.34/18,731.16
  6. Step 6: Final answer
    x = 18,812.82

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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.