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Finding the Fourth Proportional to 18,191.87, 27,287.78 and 5,712.87

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Solution

The fourth proportional to 18,191.87, 27,287.78 and 5,712.87 is: 8,569.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,191.87 : 27,287.78 = 5,712.87 : x
  2. Step 2: Convert to fraction form
    18,191.87/27,287.78 = 5,712.87/x
  3. Step 3: Cross multiply
    18,191.87x = 27,287.78 × 5,712.87
  4. Step 4: Simplify right side
    18,191.87x = 155,891,539.73
  5. Step 5: Solve for x
    x = 155,891,539.73/18,191.87
  6. Step 6: Final answer
    x = 8,569.30

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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.