Home / 8,540.90-11,781.60-5,391.62

Finding the Fourth Proportional to 8,540.90, 11,781.60 and 5,391.62

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Solution

The fourth proportional to 8,540.90, 11,781.60 and 5,391.62 is: 7,437.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,540.90 : 11,781.60 = 5,391.62 : x
  2. Step 2: Convert to fraction form
    8,540.90/11,781.60 = 5,391.62/x
  3. Step 3: Cross multiply
    8,540.90x = 11,781.60 × 5,391.62
  4. Step 4: Simplify right side
    8,540.90x = 63,521,910.19
  5. Step 5: Solve for x
    x = 63,521,910.19/8,540.90
  6. Step 6: Final answer
    x = 7,437.38

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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.