Home / 21,306.24-29,399.76-12,921.12

Finding the Fourth Proportional to 21,306.24, 29,399.76 and 12,921.12

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Solution

The fourth proportional to 21,306.24, 29,399.76 and 12,921.12 is: 17,829.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,306.24 : 29,399.76 = 12,921.12 : x
  2. Step 2: Convert to fraction form
    21,306.24/29,399.76 = 12,921.12/x
  3. Step 3: Cross multiply
    21,306.24x = 29,399.76 × 12,921.12
  4. Step 4: Simplify right side
    21,306.24x = 379,877,826.93
  5. Step 5: Solve for x
    x = 379,877,826.93/21,306.24
  6. Step 6: Final answer
    x = 17,829.42

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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.