Home / 15,211.28-20,989.20-8,496.56

Finding the Fourth Proportional to 15,211.28, 20,989.20 and 8,496.56

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Solution

The fourth proportional to 15,211.28, 20,989.20 and 8,496.56 is: 11,723.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,211.28 : 20,989.20 = 8,496.56 : x
  2. Step 2: Convert to fraction form
    15,211.28/20,989.20 = 8,496.56/x
  3. Step 3: Cross multiply
    15,211.28x = 20,989.20 × 8,496.56
  4. Step 4: Simplify right side
    15,211.28x = 178,335,997.15
  5. Step 5: Solve for x
    x = 178,335,997.15/15,211.28
  6. Step 6: Final answer
    x = 11,723.93

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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.