Home / 15,385.20-21,231.59-8,311.62

Finding the Fourth Proportional to 15,385.20, 21,231.59 and 8,311.62

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Solution

The fourth proportional to 15,385.20, 21,231.59 and 8,311.62 is: 11,470.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,385.20 : 21,231.59 = 8,311.62 : x
  2. Step 2: Convert to fraction form
    15,385.20/21,231.59 = 8,311.62/x
  3. Step 3: Cross multiply
    15,385.20x = 21,231.59 × 8,311.62
  4. Step 4: Simplify right side
    15,385.20x = 176,468,866.52
  5. Step 5: Solve for x
    x = 176,468,866.52/15,385.20
  6. Step 6: Final answer
    x = 11,470.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.