Home / 20,667.61-28,521.35-11,236.11

Finding the Fourth Proportional to 20,667.61, 28,521.35 and 11,236.11

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Solution

The fourth proportional to 20,667.61, 28,521.35 and 11,236.11 is: 15,505.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,667.61 : 28,521.35 = 11,236.11 : x
  2. Step 2: Convert to fraction form
    20,667.61/28,521.35 = 11,236.11/x
  3. Step 3: Cross multiply
    20,667.61x = 28,521.35 × 11,236.11
  4. Step 4: Simplify right side
    20,667.61x = 320,469,025.95
  5. Step 5: Solve for x
    x = 320,469,025.95/20,667.61
  6. Step 6: Final answer
    x = 15,505.86

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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.