Home / 15,713.31-21,684.80-8,543.71

Finding the Fourth Proportional to 15,713.31, 21,684.80 and 8,543.71

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Solution

The fourth proportional to 15,713.31, 21,684.80 and 8,543.71 is: 11,790.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,713.31 : 21,684.80 = 8,543.71 : x
  2. Step 2: Convert to fraction form
    15,713.31/21,684.80 = 8,543.71/x
  3. Step 3: Cross multiply
    15,713.31x = 21,684.80 × 8,543.71
  4. Step 4: Simplify right side
    15,713.31x = 185,268,642.61
  5. Step 5: Solve for x
    x = 185,268,642.61/15,713.31
  6. Step 6: Final answer
    x = 11,790.55

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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.