Home / 20,818.20-28,730.97-11,863.83

Finding the Fourth Proportional to 20,818.20, 28,730.97 and 11,863.83

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Solution

The fourth proportional to 20,818.20, 28,730.97 and 11,863.83 is: 16,373.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,818.20 : 28,730.97 = 11,863.83 : x
  2. Step 2: Convert to fraction form
    20,818.20/28,730.97 = 11,863.83/x
  3. Step 3: Cross multiply
    20,818.20x = 28,730.97 × 11,863.83
  4. Step 4: Simplify right side
    20,818.20x = 340,859,343.82
  5. Step 5: Solve for x
    x = 340,859,343.82/20,818.20
  6. Step 6: Final answer
    x = 16,373.14

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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.