Home / 20,719.28-28,591.61-11,765.60

Finding the Fourth Proportional to 20,719.28, 28,591.61 and 11,765.60

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Solution

The fourth proportional to 20,719.28, 28,591.61 and 11,765.60 is: 16,235.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,719.28 : 28,591.61 = 11,765.60 : x
  2. Step 2: Convert to fraction form
    20,719.28/28,591.61 = 11,765.60/x
  3. Step 3: Cross multiply
    20,719.28x = 28,591.61 × 11,765.60
  4. Step 4: Simplify right side
    20,719.28x = 336,397,244.83
  5. Step 5: Solve for x
    x = 336,397,244.83/20,719.28
  6. Step 6: Final answer
    x = 16,235.96

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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.