Home / 20,742.75-28,625.20-11,311.52

Finding the Fourth Proportional to 20,742.75, 28,625.20 and 11,311.52

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Solution

The fourth proportional to 20,742.75, 28,625.20 and 11,311.52 is: 15,610.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,742.75 : 28,625.20 = 11,311.52 : x
  2. Step 2: Convert to fraction form
    20,742.75/28,625.20 = 11,311.52/x
  3. Step 3: Cross multiply
    20,742.75x = 28,625.20 × 11,311.52
  4. Step 4: Simplify right side
    20,742.75x = 323,794,350.90
  5. Step 5: Solve for x
    x = 323,794,350.90/20,742.75
  6. Step 6: Final answer
    x = 15,610.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.