Home / 15,716.96-21,689.40-8,643.38

Finding the Fourth Proportional to 15,716.96, 21,689.40 and 8,643.38

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Solution

The fourth proportional to 15,716.96, 21,689.40 and 8,643.38 is: 11,927.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,716.96 : 21,689.40 = 8,643.38 : x
  2. Step 2: Convert to fraction form
    15,716.96/21,689.40 = 8,643.38/x
  3. Step 3: Cross multiply
    15,716.96x = 21,689.40 × 8,643.38
  4. Step 4: Simplify right side
    15,716.96x = 187,469,617.73
  5. Step 5: Solve for x
    x = 187,469,617.73/15,716.96
  6. Step 6: Final answer
    x = 11,927.86

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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.