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Finding the Fourth Proportional to 18,432.80, 27,649.20 and 5,284.88

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Solution

The fourth proportional to 18,432.80, 27,649.20 and 5,284.88 is: 7,927.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,432.80 : 27,649.20 = 5,284.88 : x
  2. Step 2: Convert to fraction form
    18,432.80/27,649.20 = 5,284.88/x
  3. Step 3: Cross multiply
    18,432.80x = 27,649.20 × 5,284.88
  4. Step 4: Simplify right side
    18,432.80x = 146,122,704.10
  5. Step 5: Solve for x
    x = 146,122,704.10/18,432.80
  6. Step 6: Final answer
    x = 7,927.32

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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.