Home / 21,149.54-29,189.48-12,195.30

Finding the Fourth Proportional to 21,149.54, 29,189.48 and 12,195.30

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Solution

The fourth proportional to 21,149.54, 29,189.48 and 12,195.30 is: 16,831.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,149.54 : 29,189.48 = 12,195.30 : x
  2. Step 2: Convert to fraction form
    21,149.54/29,189.48 = 12,195.30/x
  3. Step 3: Cross multiply
    21,149.54x = 29,189.48 × 12,195.30
  4. Step 4: Simplify right side
    21,149.54x = 355,974,465.44
  5. Step 5: Solve for x
    x = 355,974,465.44/21,149.54
  6. Step 6: Final answer
    x = 16,831.31

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Similar ratio
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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.