Home / 21,122.40-29,151.99-12,168.18

Finding the Fourth Proportional to 21,122.40, 29,151.99 and 12,168.18

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Solution

The fourth proportional to 21,122.40, 29,151.99 and 12,168.18 is: 16,793.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,122.40 : 29,151.99 = 12,168.18 : x
  2. Step 2: Convert to fraction form
    21,122.40/29,151.99 = 12,168.18/x
  3. Step 3: Cross multiply
    21,122.40x = 29,151.99 × 12,168.18
  4. Step 4: Simplify right side
    21,122.40x = 354,726,661.68
  5. Step 5: Solve for x
    x = 354,726,661.68/21,122.40
  6. Step 6: Final answer
    x = 16,793.86

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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.