Home / 13,281.52-18,318-12,387.28

Finding the Fourth Proportional to 13,281.52, 18,318 and 12,387.28

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Solution

The fourth proportional to 13,281.52, 18,318 and 12,387.28 is: 17,084.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,281.52 : 18,318 = 12,387.28 : x
  2. Step 2: Convert to fraction form
    13,281.52/18,318 = 12,387.28/x
  3. Step 3: Cross multiply
    13,281.52x = 18,318 × 12,387.28
  4. Step 4: Simplify right side
    13,281.52x = 226,910,195.04
  5. Step 5: Solve for x
    x = 226,910,195.04/13,281.52
  6. Step 6: Final answer
    x = 17,084.66

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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.