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Finding the Fourth Proportional to 18,471.72, 27,712.13 and 5,325.12

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Solution

The fourth proportional to 18,471.72, 27,712.13 and 5,325.12 is: 7,988.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,471.72 : 27,712.13 = 5,325.12 : x
  2. Step 2: Convert to fraction form
    18,471.72/27,712.13 = 5,325.12/x
  3. Step 3: Cross multiply
    18,471.72x = 27,712.13 × 5,325.12
  4. Step 4: Simplify right side
    18,471.72x = 147,570,391.08
  5. Step 5: Solve for x
    x = 147,570,391.08/18,471.72
  6. Step 6: Final answer
    x = 7,988.99

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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.