Home / 13,020.11-19,540.19-6,781.70

Finding the Fourth Proportional to 13,020.11, 19,540.19 and 6,781.70

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Solution

The fourth proportional to 13,020.11, 19,540.19 and 6,781.70 is: 10,177.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,020.11 : 19,540.19 = 6,781.70 : x
  2. Step 2: Convert to fraction form
    13,020.11/19,540.19 = 6,781.70/x
  3. Step 3: Cross multiply
    13,020.11x = 19,540.19 × 6,781.70
  4. Step 4: Simplify right side
    13,020.11x = 132,515,574.91
  5. Step 5: Solve for x
    x = 132,515,574.91/13,020.11
  6. Step 6: Final answer
    x = 10,177.77

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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.