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Finding the Fourth Proportional to 11,261.80, 15,540.78 and 6,545.80

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Solution

The fourth proportional to 11,261.80, 15,540.78 and 6,545.80 is: 9,032.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,261.80 : 15,540.78 = 6,545.80 : x
  2. Step 2: Convert to fraction form
    11,261.80/15,540.78 = 6,545.80/x
  3. Step 3: Cross multiply
    11,261.80x = 15,540.78 × 6,545.80
  4. Step 4: Simplify right side
    11,261.80x = 101,726,837.72
  5. Step 5: Solve for x
    x = 101,726,837.72/11,261.80
  6. Step 6: Final answer
    x = 9,032.91

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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.