Home / 21,508.20-29,682.15-11,948.80

Finding the Fourth Proportional to 21,508.20, 29,682.15 and 11,948.80

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Solution

The fourth proportional to 21,508.20, 29,682.15 and 11,948.80 is: 16,489.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,508.20 : 29,682.15 = 11,948.80 : x
  2. Step 2: Convert to fraction form
    21,508.20/29,682.15 = 11,948.80/x
  3. Step 3: Cross multiply
    21,508.20x = 29,682.15 × 11,948.80
  4. Step 4: Simplify right side
    21,508.20x = 354,666,135.78
  5. Step 5: Solve for x
    x = 354,666,135.78/21,508.20
  6. Step 6: Final answer
    x = 16,489.81

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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.