Home / 11,163.18-15,415.56-7,191.18

Finding the Fourth Proportional to 11,163.18, 15,415.56 and 7,191.18

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Solution

The fourth proportional to 11,163.18, 15,415.56 and 7,191.18 is: 9,930.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,163.18 : 15,415.56 = 7,191.18 : x
  2. Step 2: Convert to fraction form
    11,163.18/15,415.56 = 7,191.18/x
  3. Step 3: Cross multiply
    11,163.18x = 15,415.56 × 7,191.18
  4. Step 4: Simplify right side
    11,163.18x = 110,856,066.76
  5. Step 5: Solve for x
    x = 110,856,066.76/11,163.18
  6. Step 6: Final answer
    x = 9,930.51

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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.