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Finding the Fourth Proportional to 18,479.39, 27,715.01 and 5,328.90

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Solution

The fourth proportional to 18,479.39, 27,715.01 and 5,328.90 is: 7,992.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,479.39 : 27,715.01 = 5,328.90 : x
  2. Step 2: Convert to fraction form
    18,479.39/27,715.01 = 5,328.90/x
  3. Step 3: Cross multiply
    18,479.39x = 27,715.01 × 5,328.90
  4. Step 4: Simplify right side
    18,479.39x = 147,690,490.14
  5. Step 5: Solve for x
    x = 147,690,490.14/18,479.39
  6. Step 6: Final answer
    x = 7,992.18

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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.