Home / 11,115.78-15,345.35-8,592.18

Finding the Fourth Proportional to 11,115.78, 15,345.35 and 8,592.18

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Solution

The fourth proportional to 11,115.78, 15,345.35 and 8,592.18 is: 11,861.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,115.78 : 15,345.35 = 8,592.18 : x
  2. Step 2: Convert to fraction form
    11,115.78/15,345.35 = 8,592.18/x
  3. Step 3: Cross multiply
    11,115.78x = 15,345.35 × 8,592.18
  4. Step 4: Simplify right side
    11,115.78x = 131,849,966.40
  5. Step 5: Solve for x
    x = 131,849,966.40/11,115.78
  6. Step 6: Final answer
    x = 11,861.51

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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.