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Finding the Fourth Proportional to 18,472.40, 27,708.60 and 5,325.20

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Solution

The fourth proportional to 18,472.40, 27,708.60 and 5,325.20 is: 7,987.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,472.40 : 27,708.60 = 5,325.20 : x
  2. Step 2: Convert to fraction form
    18,472.40/27,708.60 = 5,325.20/x
  3. Step 3: Cross multiply
    18,472.40x = 27,708.60 × 5,325.20
  4. Step 4: Simplify right side
    18,472.40x = 147,553,836.72
  5. Step 5: Solve for x
    x = 147,553,836.72/18,472.40
  6. Step 6: Final answer
    x = 7,987.80

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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.