Home / 20,750.88-28,635.75-11,319.78

Finding the Fourth Proportional to 20,750.88, 28,635.75 and 11,319.78

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Solution

The fourth proportional to 20,750.88, 28,635.75 and 11,319.78 is: 15,621.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,750.88 : 28,635.75 = 11,319.78 : x
  2. Step 2: Convert to fraction form
    20,750.88/28,635.75 = 11,319.78/x
  3. Step 3: Cross multiply
    20,750.88x = 28,635.75 × 11,319.78
  4. Step 4: Simplify right side
    20,750.88x = 324,150,390.14
  5. Step 5: Solve for x
    x = 324,150,390.14/20,750.88
  6. Step 6: Final answer
    x = 15,621.04

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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.