Home / 20,818.82-28,730.72-11,864.88

Finding the Fourth Proportional to 20,818.82, 28,730.72 and 11,864.88

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Solution

The fourth proportional to 20,818.82, 28,730.72 and 11,864.88 is: 16,373.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,818.82 : 28,730.72 = 11,864.88 : x
  2. Step 2: Convert to fraction form
    20,818.82/28,730.72 = 11,864.88/x
  3. Step 3: Cross multiply
    20,818.82x = 28,730.72 × 11,864.88
  4. Step 4: Simplify right side
    20,818.82x = 340,886,508.04
  5. Step 5: Solve for x
    x = 340,886,508.04/20,818.82
  6. Step 6: Final answer
    x = 16,373.96

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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.