Home / 15,716.53-21,689.27-8,643.41

Finding the Fourth Proportional to 15,716.53, 21,689.27 and 8,643.41

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Solution

The fourth proportional to 15,716.53, 21,689.27 and 8,643.41 is: 11,928.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,716.53 : 21,689.27 = 8,643.41 : x
  2. Step 2: Convert to fraction form
    15,716.53/21,689.27 = 8,643.41/x
  3. Step 3: Cross multiply
    15,716.53x = 21,689.27 × 8,643.41
  4. Step 4: Simplify right side
    15,716.53x = 187,469,215.29
  5. Step 5: Solve for x
    x = 187,469,215.29/15,716.53
  6. Step 6: Final answer
    x = 11,928.15

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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.