Home / 21,178.59-29,226.60-11,747.76

Finding the Fourth Proportional to 21,178.59, 29,226.60 and 11,747.76

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Solution

The fourth proportional to 21,178.59, 29,226.60 and 11,747.76 is: 16,211.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,178.59 : 29,226.60 = 11,747.76 : x
  2. Step 2: Convert to fraction form
    21,178.59/29,226.60 = 11,747.76/x
  3. Step 3: Cross multiply
    21,178.59x = 29,226.60 × 11,747.76
  4. Step 4: Simplify right side
    21,178.59x = 343,347,082.42
  5. Step 5: Solve for x
    x = 343,347,082.42/21,178.59
  6. Step 6: Final answer
    x = 16,211.99

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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.