Home / 21,245.75-31,872.42-8,758.83

Finding the Fourth Proportional to 21,245.75, 31,872.42 and 8,758.83

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Solution

The fourth proportional to 21,245.75, 31,872.42 and 8,758.83 is: 13,139.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,245.75 : 31,872.42 = 8,758.83 : x
  2. Step 2: Convert to fraction form
    21,245.75/31,872.42 = 8,758.83/x
  3. Step 3: Cross multiply
    21,245.75x = 31,872.42 × 8,758.83
  4. Step 4: Simplify right side
    21,245.75x = 279,165,108.47
  5. Step 5: Solve for x
    x = 279,165,108.47/21,245.75
  6. Step 6: Final answer
    x = 13,139.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.