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Finding the Fourth Proportional to 8,081.40, 12,123.90 and 3,150.60

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Solution

The fourth proportional to 8,081.40, 12,123.90 and 3,150.60 is: 4,726.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,081.40 : 12,123.90 = 3,150.60 : x
  2. Step 2: Convert to fraction form
    8,081.40/12,123.90 = 3,150.60/x
  3. Step 3: Cross multiply
    8,081.40x = 12,123.90 × 3,150.60
  4. Step 4: Simplify right side
    8,081.40x = 38,197,559.34
  5. Step 5: Solve for x
    x = 38,197,559.34/8,081.40
  6. Step 6: Final answer
    x = 4,726.60

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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.