Home / 11,115.63-15,331.28-8,143.47

Finding the Fourth Proportional to 11,115.63, 15,331.28 and 8,143.47

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Solution

The fourth proportional to 11,115.63, 15,331.28 and 8,143.47 is: 11,231.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,115.63 : 15,331.28 = 8,143.47 : x
  2. Step 2: Convert to fraction form
    11,115.63/15,331.28 = 8,143.47/x
  3. Step 3: Cross multiply
    11,115.63x = 15,331.28 × 8,143.47
  4. Step 4: Simplify right side
    11,115.63x = 124,849,778.02
  5. Step 5: Solve for x
    x = 124,849,778.02/11,115.63
  6. Step 6: Final answer
    x = 11,231.91

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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.