Home / 12,057.20-18,085.80-5,131.70

Finding the Fourth Proportional to 12,057.20, 18,085.80 and 5,131.70

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Solution

The fourth proportional to 12,057.20, 18,085.80 and 5,131.70 is: 7,697.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,057.20 : 18,085.80 = 5,131.70 : x
  2. Step 2: Convert to fraction form
    12,057.20/18,085.80 = 5,131.70/x
  3. Step 3: Cross multiply
    12,057.20x = 18,085.80 × 5,131.70
  4. Step 4: Simplify right side
    12,057.20x = 92,810,899.86
  5. Step 5: Solve for x
    x = 92,810,899.86/12,057.20
  6. Step 6: Final answer
    x = 7,697.55

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Similar ratio
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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.