Home / 21,178.24-29,227.36-11,747.84

Finding the Fourth Proportional to 21,178.24, 29,227.36 and 11,747.84

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Solution

The fourth proportional to 21,178.24, 29,227.36 and 11,747.84 is: 16,212.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,178.24 : 29,227.36 = 11,747.84 : x
  2. Step 2: Convert to fraction form
    21,178.24/29,227.36 = 11,747.84/x
  3. Step 3: Cross multiply
    21,178.24x = 29,227.36 × 11,747.84
  4. Step 4: Simplify right side
    21,178.24x = 343,358,348.90
  5. Step 5: Solve for x
    x = 343,358,348.90/21,178.24
  6. Step 6: Final answer
    x = 16,212.79

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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.