Home / 13,609.92-20,397.60-7,769.76

Finding the Fourth Proportional to 13,609.92, 20,397.60 and 7,769.76

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Solution

The fourth proportional to 13,609.92, 20,397.60 and 7,769.76 is: 11,644.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,609.92 : 20,397.60 = 7,769.76 : x
  2. Step 2: Convert to fraction form
    13,609.92/20,397.60 = 7,769.76/x
  3. Step 3: Cross multiply
    13,609.92x = 20,397.60 × 7,769.76
  4. Step 4: Simplify right side
    13,609.92x = 158,484,456.58
  5. Step 5: Solve for x
    x = 158,484,456.58/13,609.92
  6. Step 6: Final answer
    x = 11,644.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.