Home / 20,819.06-28,730.97-11,387.62

Finding the Fourth Proportional to 20,819.06, 28,730.97 and 11,387.62

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Solution

The fourth proportional to 20,819.06, 28,730.97 and 11,387.62 is: 15,715.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,819.06 : 28,730.97 = 11,387.62 : x
  2. Step 2: Convert to fraction form
    20,819.06/28,730.97 = 11,387.62/x
  3. Step 3: Cross multiply
    20,819.06x = 28,730.97 × 11,387.62
  4. Step 4: Simplify right side
    20,819.06x = 327,177,296.76
  5. Step 5: Solve for x
    x = 327,177,296.76/20,819.06
  6. Step 6: Final answer
    x = 15,715.28

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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.