Home / 12,387.36-18,531.12-10,677.28

Finding the Fourth Proportional to 12,387.36, 18,531.12 and 10,677.28

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Solution

The fourth proportional to 12,387.36, 18,531.12 and 10,677.28 is: 15,972.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,387.36 : 18,531.12 = 10,677.28 : x
  2. Step 2: Convert to fraction form
    12,387.36/18,531.12 = 10,677.28/x
  3. Step 3: Cross multiply
    12,387.36x = 18,531.12 × 10,677.28
  4. Step 4: Simplify right side
    12,387.36x = 197,861,956.95
  5. Step 5: Solve for x
    x = 197,861,956.95/12,387.36
  6. Step 6: Final answer
    x = 15,972.89

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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.