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Finding the Fourth Proportional to 18,553.20, 27,808.20 and 7,454.40

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Solution

The fourth proportional to 18,553.20, 27,808.20 and 7,454.40 is: 11,172.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,553.20 : 27,808.20 = 7,454.40 : x
  2. Step 2: Convert to fraction form
    18,553.20/27,808.20 = 7,454.40/x
  3. Step 3: Cross multiply
    18,553.20x = 27,808.20 × 7,454.40
  4. Step 4: Simplify right side
    18,553.20x = 207,293,446.08
  5. Step 5: Solve for x
    x = 207,293,446.08/18,553.20
  6. Step 6: Final answer
    x = 11,172.92

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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.