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Finding the Fourth Proportional to 18,432.80, 27,649.20 and 4,581.80

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Solution

The fourth proportional to 18,432.80, 27,649.20 and 4,581.80 is: 6,872.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,432.80 : 27,649.20 = 4,581.80 : x
  2. Step 2: Convert to fraction form
    18,432.80/27,649.20 = 4,581.80/x
  3. Step 3: Cross multiply
    18,432.80x = 27,649.20 × 4,581.80
  4. Step 4: Simplify right side
    18,432.80x = 126,682,966.31
  5. Step 5: Solve for x
    x = 126,682,966.31/18,432.80
  6. Step 6: Final answer
    x = 6,872.69

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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.