Home / 20,514.88-28,317.54-12,759.85

Finding the Fourth Proportional to 20,514.88, 28,317.54 and 12,759.85

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Solution

The fourth proportional to 20,514.88, 28,317.54 and 12,759.85 is: 17,612.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,514.88 : 28,317.54 = 12,759.85 : x
  2. Step 2: Convert to fraction form
    20,514.88/28,317.54 = 12,759.85/x
  3. Step 3: Cross multiply
    20,514.88x = 28,317.54 × 12,759.85
  4. Step 4: Simplify right side
    20,514.88x = 361,327,562.77
  5. Step 5: Solve for x
    x = 361,327,562.77/20,514.88
  6. Step 6: Final answer
    x = 17,612.95

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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.