Home / 20,512.23-28,306.89-11,080.80

Finding the Fourth Proportional to 20,512.23, 28,306.89 and 11,080.80

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Solution

The fourth proportional to 20,512.23, 28,306.89 and 11,080.80 is: 15,291.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,512.23 : 28,306.89 = 11,080.80 : x
  2. Step 2: Convert to fraction form
    20,512.23/28,306.89 = 11,080.80/x
  3. Step 3: Cross multiply
    20,512.23x = 28,306.89 × 11,080.80
  4. Step 4: Simplify right side
    20,512.23x = 313,662,986.71
  5. Step 5: Solve for x
    x = 313,662,986.71/20,512.23
  6. Step 6: Final answer
    x = 15,291.51

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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.