Home / 11,138.13-15,377.61-7,166.15

Finding the Fourth Proportional to 11,138.13, 15,377.61 and 7,166.15

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Solution

The fourth proportional to 11,138.13, 15,377.61 and 7,166.15 is: 9,893.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,138.13 : 15,377.61 = 7,166.15 : x
  2. Step 2: Convert to fraction form
    11,138.13/15,377.61 = 7,166.15/x
  3. Step 3: Cross multiply
    11,138.13x = 15,377.61 × 7,166.15
  4. Step 4: Simplify right side
    11,138.13x = 110,198,194.07
  5. Step 5: Solve for x
    x = 110,198,194.07/11,138.13
  6. Step 6: Final answer
    x = 9,893.78

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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.