Home / 21,708.18-29,958.90-12,149.03

Finding the Fourth Proportional to 21,708.18, 29,958.90 and 12,149.03

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Solution

The fourth proportional to 21,708.18, 29,958.90 and 12,149.03 is: 16,766.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,708.18 : 29,958.90 = 12,149.03 : x
  2. Step 2: Convert to fraction form
    21,708.18/29,958.90 = 12,149.03/x
  3. Step 3: Cross multiply
    21,708.18x = 29,958.90 × 12,149.03
  4. Step 4: Simplify right side
    21,708.18x = 363,971,425.07
  5. Step 5: Solve for x
    x = 363,971,425.07/21,708.18
  6. Step 6: Final answer
    x = 16,766.56

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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.