Home / 11,189.54-15,431.28-8,663.55

Finding the Fourth Proportional to 11,189.54, 15,431.28 and 8,663.55

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Solution

The fourth proportional to 11,189.54, 15,431.28 and 8,663.55 is: 11,947.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,189.54 : 15,431.28 = 8,663.55 : x
  2. Step 2: Convert to fraction form
    11,189.54/15,431.28 = 8,663.55/x
  3. Step 3: Cross multiply
    11,189.54x = 15,431.28 × 8,663.55
  4. Step 4: Simplify right side
    11,189.54x = 133,689,665.84
  5. Step 5: Solve for x
    x = 133,689,665.84/11,189.54
  6. Step 6: Final answer
    x = 11,947.74

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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.