Home / 12,487.97-18,731.52-3,128.07

Finding the Fourth Proportional to 12,487.97, 18,731.52 and 3,128.07

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Solution

The fourth proportional to 12,487.97, 18,731.52 and 3,128.07 is: 4,691.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,487.97 : 18,731.52 = 3,128.07 : x
  2. Step 2: Convert to fraction form
    12,487.97/18,731.52 = 3,128.07/x
  3. Step 3: Cross multiply
    12,487.97x = 18,731.52 × 3,128.07
  4. Step 4: Simplify right side
    12,487.97x = 58,593,477.24
  5. Step 5: Solve for x
    x = 58,593,477.24/12,487.97
  6. Step 6: Final answer
    x = 4,691.99

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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.