Home / 11,331.20-16,981.28-8,555.52

Finding the Fourth Proportional to 11,331.20, 16,981.28 and 8,555.52

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Solution

The fourth proportional to 11,331.20, 16,981.28 and 8,555.52 is: 12,821.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,331.20 : 16,981.28 = 8,555.52 : x
  2. Step 2: Convert to fraction form
    11,331.20/16,981.28 = 8,555.52/x
  3. Step 3: Cross multiply
    11,331.20x = 16,981.28 × 8,555.52
  4. Step 4: Simplify right side
    11,331.20x = 145,283,680.67
  5. Step 5: Solve for x
    x = 145,283,680.67/11,331.20
  6. Step 6: Final answer
    x = 12,821.56

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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.