Home / 20,872.95-28,805.78-11,441.91

Finding the Fourth Proportional to 20,872.95, 28,805.78 and 11,441.91

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Solution

The fourth proportional to 20,872.95, 28,805.78 and 11,441.91 is: 15,790.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,872.95 : 28,805.78 = 11,441.91 : x
  2. Step 2: Convert to fraction form
    20,872.95/28,805.78 = 11,441.91/x
  3. Step 3: Cross multiply
    20,872.95x = 28,805.78 × 11,441.91
  4. Step 4: Simplify right side
    20,872.95x = 329,593,142.24
  5. Step 5: Solve for x
    x = 329,593,142.24/20,872.95
  6. Step 6: Final answer
    x = 15,790.44

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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.