Home / 15,715.26-21,687.18-8,641.80

Finding the Fourth Proportional to 15,715.26, 21,687.18 and 8,641.80

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Solution

The fourth proportional to 15,715.26, 21,687.18 and 8,641.80 is: 11,925.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,715.26 : 21,687.18 = 8,641.80 : x
  2. Step 2: Convert to fraction form
    15,715.26/21,687.18 = 8,641.80/x
  3. Step 3: Cross multiply
    15,715.26x = 21,687.18 × 8,641.80
  4. Step 4: Simplify right side
    15,715.26x = 187,416,272.12
  5. Step 5: Solve for x
    x = 187,416,272.12/15,715.26
  6. Step 6: Final answer
    x = 11,925.75

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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.