Home / 8,121.40-12,153.30-5,644.60

Finding the Fourth Proportional to 8,121.40, 12,153.30 and 5,644.60

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Solution

The fourth proportional to 8,121.40, 12,153.30 and 5,644.60 is: 8,446.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.40 : 12,153.30 = 5,644.60 : x
  2. Step 2: Convert to fraction form
    8,121.40/12,153.30 = 5,644.60/x
  3. Step 3: Cross multiply
    8,121.40x = 12,153.30 × 5,644.60
  4. Step 4: Simplify right side
    8,121.40x = 68,600,517.18
  5. Step 5: Solve for x
    x = 68,600,517.18/8,121.40
  6. Step 6: Final answer
    x = 8,446.88

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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.