Home / 11,186.20-15,437.78-7,402.78

Finding the Fourth Proportional to 11,186.20, 15,437.78 and 7,402.78

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Solution

The fourth proportional to 11,186.20, 15,437.78 and 7,402.78 is: 10,216.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,186.20 : 15,437.78 = 7,402.78 : x
  2. Step 2: Convert to fraction form
    11,186.20/15,437.78 = 7,402.78/x
  3. Step 3: Cross multiply
    11,186.20x = 15,437.78 × 7,402.78
  4. Step 4: Simplify right side
    11,186.20x = 114,282,489.03
  5. Step 5: Solve for x
    x = 114,282,489.03/11,186.20
  6. Step 6: Final answer
    x = 10,216.38

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Half scale
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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.