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Finding the Fourth Proportional to 18,397.78, 27,593.58 and 5,247.16

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Solution

The fourth proportional to 18,397.78, 27,593.58 and 5,247.16 is: 7,869.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,397.78 : 27,593.58 = 5,247.16 : x
  2. Step 2: Convert to fraction form
    18,397.78/27,593.58 = 5,247.16/x
  3. Step 3: Cross multiply
    18,397.78x = 27,593.58 × 5,247.16
  4. Step 4: Simplify right side
    18,397.78x = 144,787,929.23
  5. Step 5: Solve for x
    x = 144,787,929.23/18,397.78
  6. Step 6: Final answer
    x = 7,869.86

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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.