Home / 6,521.18-9,781.73-2,138.61

Finding the Fourth Proportional to 6,521.18, 9,781.73 and 2,138.61

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Solution

The fourth proportional to 6,521.18, 9,781.73 and 2,138.61 is: 3,207.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,521.18 : 9,781.73 = 2,138.61 : x
  2. Step 2: Convert to fraction form
    6,521.18/9,781.73 = 2,138.61/x
  3. Step 3: Cross multiply
    6,521.18x = 9,781.73 × 2,138.61
  4. Step 4: Simplify right side
    6,521.18x = 20,919,256.69
  5. Step 5: Solve for x
    x = 20,919,256.69/6,521.18
  6. Step 6: Final answer
    x = 3,207.89

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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.