Home / 21,141.38-29,175.72-12,191.70

Finding the Fourth Proportional to 21,141.38, 29,175.72 and 12,191.70

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Solution

The fourth proportional to 21,141.38, 29,175.72 and 12,191.70 is: 16,824.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,141.38 : 29,175.72 = 12,191.70 : x
  2. Step 2: Convert to fraction form
    21,141.38/29,175.72 = 12,191.70/x
  3. Step 3: Cross multiply
    21,141.38x = 29,175.72 × 12,191.70
  4. Step 4: Simplify right side
    21,141.38x = 355,701,625.52
  5. Step 5: Solve for x
    x = 355,701,625.52/21,141.38
  6. Step 6: Final answer
    x = 16,824.90

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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.