Home / 21,084.26-29,099.20-12,131.60

Finding the Fourth Proportional to 21,084.26, 29,099.20 and 12,131.60

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Solution

The fourth proportional to 21,084.26, 29,099.20 and 12,131.60 is: 16,743.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,084.26 : 29,099.20 = 12,131.60 : x
  2. Step 2: Convert to fraction form
    21,084.26/29,099.20 = 12,131.60/x
  3. Step 3: Cross multiply
    21,084.26x = 29,099.20 × 12,131.60
  4. Step 4: Simplify right side
    21,084.26x = 353,019,854.72
  5. Step 5: Solve for x
    x = 353,019,854.72/21,084.26
  6. Step 6: Final answer
    x = 16,743.29

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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.