Home / 21,222.78-29,275.24-13,251.16

Finding the Fourth Proportional to 21,222.78, 29,275.24 and 13,251.16

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Solution

The fourth proportional to 21,222.78, 29,275.24 and 13,251.16 is: 18,278.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,222.78 : 29,275.24 = 13,251.16 : x
  2. Step 2: Convert to fraction form
    21,222.78/29,275.24 = 13,251.16/x
  3. Step 3: Cross multiply
    21,222.78x = 29,275.24 × 13,251.16
  4. Step 4: Simplify right side
    21,222.78x = 387,930,921.49
  5. Step 5: Solve for x
    x = 387,930,921.49/21,222.78
  6. Step 6: Final answer
    x = 18,278.99

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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.