Home / 15,891.46-21,930.22-8,817.87

Finding the Fourth Proportional to 15,891.46, 21,930.22 and 8,817.87

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Solution

The fourth proportional to 15,891.46, 21,930.22 and 8,817.87 is: 12,168.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,891.46 : 21,930.22 = 8,817.87 : x
  2. Step 2: Convert to fraction form
    15,891.46/21,930.22 = 8,817.87/x
  3. Step 3: Cross multiply
    15,891.46x = 21,930.22 × 8,817.87
  4. Step 4: Simplify right side
    15,891.46x = 193,377,829.03
  5. Step 5: Solve for x
    x = 193,377,829.03/15,891.46
  6. Step 6: Final answer
    x = 12,168.66

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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.