Home / 20,809.62-28,717.38-11,378.20

Finding the Fourth Proportional to 20,809.62, 28,717.38 and 11,378.20

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Solution

The fourth proportional to 20,809.62, 28,717.38 and 11,378.20 is: 15,701.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,809.62 : 28,717.38 = 11,378.20 : x
  2. Step 2: Convert to fraction form
    20,809.62/28,717.38 = 11,378.20/x
  3. Step 3: Cross multiply
    20,809.62x = 28,717.38 × 11,378.20
  4. Step 4: Simplify right side
    20,809.62x = 326,752,093.12
  5. Step 5: Solve for x
    x = 326,752,093.12/20,809.62
  6. Step 6: Final answer
    x = 15,701.97

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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.