Home / 20,512.85-28,307.76-11,081.42

Finding the Fourth Proportional to 20,512.85, 28,307.76 and 11,081.42

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Solution

The fourth proportional to 20,512.85, 28,307.76 and 11,081.42 is: 15,292.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,512.85 : 28,307.76 = 11,081.42 : x
  2. Step 2: Convert to fraction form
    20,512.85/28,307.76 = 11,081.42/x
  3. Step 3: Cross multiply
    20,512.85x = 28,307.76 × 11,081.42
  4. Step 4: Simplify right side
    20,512.85x = 313,690,036.28
  5. Step 5: Solve for x
    x = 313,690,036.28/20,512.85
  6. Step 6: Final answer
    x = 15,292.37

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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.