Home / 8,123.40-12,185.10-7,248.60

Finding the Fourth Proportional to 8,123.40, 12,185.10 and 7,248.60

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Solution

The fourth proportional to 8,123.40, 12,185.10 and 7,248.60 is: 10,872.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,123.40 : 12,185.10 = 7,248.60 : x
  2. Step 2: Convert to fraction form
    8,123.40/12,185.10 = 7,248.60/x
  3. Step 3: Cross multiply
    8,123.40x = 12,185.10 × 7,248.60
  4. Step 4: Simplify right side
    8,123.40x = 88,324,915.86
  5. Step 5: Solve for x
    x = 88,324,915.86/8,123.40
  6. Step 6: Final answer
    x = 10,872.90

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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.