Home / 15,872.20-21,904.38-8,798.78

Finding the Fourth Proportional to 15,872.20, 21,904.38 and 8,798.78

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Solution

The fourth proportional to 15,872.20, 21,904.38 and 8,798.78 is: 12,142.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,872.20 : 21,904.38 = 8,798.78 : x
  2. Step 2: Convert to fraction form
    15,872.20/21,904.38 = 8,798.78/x
  3. Step 3: Cross multiply
    15,872.20x = 21,904.38 × 8,798.78
  4. Step 4: Simplify right side
    15,872.20x = 192,731,820.66
  5. Step 5: Solve for x
    x = 192,731,820.66/15,872.20
  6. Step 6: Final answer
    x = 12,142.73

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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.