Home / 10,138.55-15,182.98-8,372.75

Finding the Fourth Proportional to 10,138.55, 15,182.98 and 8,372.75

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Solution

The fourth proportional to 10,138.55, 15,182.98 and 8,372.75 is: 12,538.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,138.55 : 15,182.98 = 8,372.75 : x
  2. Step 2: Convert to fraction form
    10,138.55/15,182.98 = 8,372.75/x
  3. Step 3: Cross multiply
    10,138.55x = 15,182.98 × 8,372.75
  4. Step 4: Simplify right side
    10,138.55x = 127,123,198.95
  5. Step 5: Solve for x
    x = 127,123,198.95/10,138.55
  6. Step 6: Final answer
    x = 12,538.60

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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.