Home / 20,759.80-28,649.15-11,808.59

Finding the Fourth Proportional to 20,759.80, 28,649.15 and 11,808.59

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Solution

The fourth proportional to 20,759.80, 28,649.15 and 11,808.59 is: 16,296.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,759.80 : 28,649.15 = 11,808.59 : x
  2. Step 2: Convert to fraction form
    20,759.80/28,649.15 = 11,808.59/x
  3. Step 3: Cross multiply
    20,759.80x = 28,649.15 × 11,808.59
  4. Step 4: Simplify right side
    20,759.80x = 338,306,066.20
  5. Step 5: Solve for x
    x = 338,306,066.20/20,759.80
  6. Step 6: Final answer
    x = 16,296.21

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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.