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Finding the Fourth Proportional to 21,899.26, 30,221.01 and 12,951.19

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Solution

The fourth proportional to 21,899.26, 30,221.01 and 12,951.19 is: 17,872.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,899.26 : 30,221.01 = 12,951.19 : x
  2. Step 2: Convert to fraction form
    21,899.26/30,221.01 = 12,951.19/x
  3. Step 3: Cross multiply
    21,899.26x = 30,221.01 × 12,951.19
  4. Step 4: Simplify right side
    21,899.26x = 391,398,042.50
  5. Step 5: Solve for x
    x = 391,398,042.50/21,899.26
  6. Step 6: Final answer
    x = 17,872.66

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Double scale
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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.