Home / 20,619.56-28,454.16-11,187.92

Finding the Fourth Proportional to 20,619.56, 28,454.16 and 11,187.92

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Solution

The fourth proportional to 20,619.56, 28,454.16 and 11,187.92 is: 15,438.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,619.56 : 28,454.16 = 11,187.92 : x
  2. Step 2: Convert to fraction form
    20,619.56/28,454.16 = 11,187.92/x
  3. Step 3: Cross multiply
    20,619.56x = 28,454.16 × 11,187.92
  4. Step 4: Simplify right side
    20,619.56x = 318,342,865.75
  5. Step 5: Solve for x
    x = 318,342,865.75/20,619.56
  6. Step 6: Final answer
    x = 15,438.88

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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.