Home / 6,521.13-9,781.70-2,138.59

Finding the Fourth Proportional to 6,521.13, 9,781.70 and 2,138.59

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Solution

The fourth proportional to 6,521.13, 9,781.70 and 2,138.59 is: 3,207.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,521.13 : 9,781.70 = 2,138.59 : x
  2. Step 2: Convert to fraction form
    6,521.13/9,781.70 = 2,138.59/x
  3. Step 3: Cross multiply
    6,521.13x = 9,781.70 × 2,138.59
  4. Step 4: Simplify right side
    6,521.13x = 20,919,042.60
  5. Step 5: Solve for x
    x = 20,919,042.60/6,521.13
  6. Step 6: Final answer
    x = 3,207.88

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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.