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Finding the Fourth Proportional to 18,432.78, 27,649.16 and 4,581.78

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Solution

The fourth proportional to 18,432.78, 27,649.16 and 4,581.78 is: 6,872.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,432.78 : 27,649.16 = 4,581.78 : x
  2. Step 2: Convert to fraction form
    18,432.78/27,649.16 = 4,581.78/x
  3. Step 3: Cross multiply
    18,432.78x = 27,649.16 × 4,581.78
  4. Step 4: Simplify right side
    18,432.78x = 126,682,368.30
  5. Step 5: Solve for x
    x = 126,682,368.30/18,432.78
  6. Step 6: Final answer
    x = 6,872.67

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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.