Home / 10,087.20-15,131.52-3,161.70

Finding the Fourth Proportional to 10,087.20, 15,131.52 and 3,161.70

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Solution

The fourth proportional to 10,087.20, 15,131.52 and 3,161.70 is: 4,742.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,087.20 : 15,131.52 = 3,161.70 : x
  2. Step 2: Convert to fraction form
    10,087.20/15,131.52 = 3,161.70/x
  3. Step 3: Cross multiply
    10,087.20x = 15,131.52 × 3,161.70
  4. Step 4: Simplify right side
    10,087.20x = 47,841,326.78
  5. Step 5: Solve for x
    x = 47,841,326.78/10,087.20
  6. Step 6: Final answer
    x = 4,742.78

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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.