Home / 11,195.78-15,447.51-7,212.20

Finding the Fourth Proportional to 11,195.78, 15,447.51 and 7,212.20

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Solution

The fourth proportional to 11,195.78, 15,447.51 and 7,212.20 is: 9,951.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,195.78 : 15,447.51 = 7,212.20 : x
  2. Step 2: Convert to fraction form
    11,195.78/15,447.51 = 7,212.20/x
  3. Step 3: Cross multiply
    11,195.78x = 15,447.51 × 7,212.20
  4. Step 4: Simplify right side
    11,195.78x = 111,410,454.38
  5. Step 5: Solve for x
    x = 111,410,454.38/11,195.78
  6. Step 6: Final answer
    x = 9,951.12

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Half scale
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Double 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.