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Finding the Fourth Proportional to 18,078.75, 27,132.75 and 9,316.17

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Solution

The fourth proportional to 18,078.75, 27,132.75 and 9,316.17 is: 13,981.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,078.75 : 27,132.75 = 9,316.17 : x
  2. Step 2: Convert to fraction form
    18,078.75/27,132.75 = 9,316.17/x
  3. Step 3: Cross multiply
    18,078.75x = 27,132.75 × 9,316.17
  4. Step 4: Simplify right side
    18,078.75x = 252,773,311.57
  5. Step 5: Solve for x
    x = 252,773,311.57/18,078.75
  6. Step 6: Final answer
    x = 13,981.79

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1.5x scale

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.