Home / 15,057.13-20,778.87-8,342.70

Finding the Fourth Proportional to 15,057.13, 20,778.87 and 8,342.70

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Solution

The fourth proportional to 15,057.13, 20,778.87 and 8,342.70 is: 11,512.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,057.13 : 20,778.87 = 8,342.70 : x
  2. Step 2: Convert to fraction form
    15,057.13/20,778.87 = 8,342.70/x
  3. Step 3: Cross multiply
    15,057.13x = 20,778.87 × 8,342.70
  4. Step 4: Simplify right side
    15,057.13x = 173,351,910.03
  5. Step 5: Solve for x
    x = 173,351,910.03/15,057.13
  6. Step 6: Final answer
    x = 11,512.95

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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.