Home / 15,805.41-21,811.25-8,731.95

Finding the Fourth Proportional to 15,805.41, 21,811.25 and 8,731.95

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Solution

The fourth proportional to 15,805.41, 21,811.25 and 8,731.95 is: 12,049.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,805.41 : 21,811.25 = 8,731.95 : x
  2. Step 2: Convert to fraction form
    15,805.41/21,811.25 = 8,731.95/x
  3. Step 3: Cross multiply
    15,805.41x = 21,811.25 × 8,731.95
  4. Step 4: Simplify right side
    15,805.41x = 190,454,700.78
  5. Step 5: Solve for x
    x = 190,454,700.78/15,805.41
  6. Step 6: Final answer
    x = 12,049.97

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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.