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Finding the Fourth Proportional to 18,191.19, 27,286.79 and 5,712.32

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Solution

The fourth proportional to 18,191.19, 27,286.79 and 5,712.32 is: 8,568.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,191.19 : 27,286.79 = 5,712.32 : x
  2. Step 2: Convert to fraction form
    18,191.19/27,286.79 = 5,712.32/x
  3. Step 3: Cross multiply
    18,191.19x = 27,286.79 × 5,712.32
  4. Step 4: Simplify right side
    18,191.19x = 155,870,711.26
  5. Step 5: Solve for x
    x = 155,870,711.26/18,191.19
  6. Step 6: Final answer
    x = 8,568.47

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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.