Home / 8,311.60-12,472.56-3,121.12

Finding the Fourth Proportional to 8,311.60, 12,472.56 and 3,121.12

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Solution

The fourth proportional to 8,311.60, 12,472.56 and 3,121.12 is: 4,683.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,311.60 : 12,472.56 = 3,121.12 : x
  2. Step 2: Convert to fraction form
    8,311.60/12,472.56 = 3,121.12/x
  3. Step 3: Cross multiply
    8,311.60x = 12,472.56 × 3,121.12
  4. Step 4: Simplify right side
    8,311.60x = 38,928,356.47
  5. Step 5: Solve for x
    x = 38,928,356.47/8,311.60
  6. Step 6: Final answer
    x = 4,683.62

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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.