Home / 21,179.28-29,226.96-11,747.76

Finding the Fourth Proportional to 21,179.28, 29,226.96 and 11,747.76

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Solution

The fourth proportional to 21,179.28, 29,226.96 and 11,747.76 is: 16,211.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,179.28 : 29,226.96 = 11,747.76 : x
  2. Step 2: Convert to fraction form
    21,179.28/29,226.96 = 11,747.76/x
  3. Step 3: Cross multiply
    21,179.28x = 29,226.96 × 11,747.76
  4. Step 4: Simplify right side
    21,179.28x = 343,351,311.61
  5. Step 5: Solve for x
    x = 343,351,311.61/21,179.28
  6. Step 6: Final answer
    x = 16,211.66

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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.