Home / 21,145.67-29,174.41-12,191.97

Finding the Fourth Proportional to 21,145.67, 29,174.41 and 12,191.97

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Solution

The fourth proportional to 21,145.67, 29,174.41 and 12,191.97 is: 16,821.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,145.67 : 29,174.41 = 12,191.97 : x
  2. Step 2: Convert to fraction form
    21,145.67/29,174.41 = 12,191.97/x
  3. Step 3: Cross multiply
    21,145.67x = 29,174.41 × 12,191.97
  4. Step 4: Simplify right side
    21,145.67x = 355,693,531.49
  5. Step 5: Solve for x
    x = 355,693,531.49/21,145.67
  6. Step 6: Final answer
    x = 16,821.10

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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.