Home / 20,767.28-28,658.90-11,335.85

Finding the Fourth Proportional to 20,767.28, 28,658.90 and 11,335.85

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Solution

The fourth proportional to 20,767.28, 28,658.90 and 11,335.85 is: 15,643.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,767.28 : 28,658.90 = 11,335.85 : x
  2. Step 2: Convert to fraction form
    20,767.28/28,658.90 = 11,335.85/x
  3. Step 3: Cross multiply
    20,767.28x = 28,658.90 × 11,335.85
  4. Step 4: Simplify right side
    20,767.28x = 324,872,991.57
  5. Step 5: Solve for x
    x = 324,872,991.57/20,767.28
  6. Step 6: Final answer
    x = 15,643.50

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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.