Home / 21,158.56-29,198.78-12,205.92

Finding the Fourth Proportional to 21,158.56, 29,198.78 and 12,205.92

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Solution

The fourth proportional to 21,158.56, 29,198.78 and 12,205.92 is: 16,844.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,158.56 : 29,198.78 = 12,205.92 : x
  2. Step 2: Convert to fraction form
    21,158.56/29,198.78 = 12,205.92/x
  3. Step 3: Cross multiply
    21,158.56x = 29,198.78 × 12,205.92
  4. Step 4: Simplify right side
    21,158.56x = 356,397,972.78
  5. Step 5: Solve for x
    x = 356,397,972.78/21,158.56
  6. Step 6: Final answer
    x = 16,844.15

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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.