Home / 20,680.18-28,538.52-11,248.78

Finding the Fourth Proportional to 20,680.18, 28,538.52 and 11,248.78

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Solution

The fourth proportional to 20,680.18, 28,538.52 and 11,248.78 is: 15,523.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,680.18 : 28,538.52 = 11,248.78 : x
  2. Step 2: Convert to fraction form
    20,680.18/28,538.52 = 11,248.78/x
  3. Step 3: Cross multiply
    20,680.18x = 28,538.52 × 11,248.78
  4. Step 4: Simplify right side
    20,680.18x = 321,023,533.01
  5. Step 5: Solve for x
    x = 321,023,533.01/20,680.18
  6. Step 6: Final answer
    x = 15,523.25

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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.