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Finding the Fourth Proportional to 8,115.25, 11,199.06 and 4,389.25

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Solution

The fourth proportional to 8,115.25, 11,199.06 and 4,389.25 is: 6,057.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,115.25 : 11,199.06 = 4,389.25 : x
  2. Step 2: Convert to fraction form
    8,115.25/11,199.06 = 4,389.25/x
  3. Step 3: Cross multiply
    8,115.25x = 11,199.06 × 4,389.25
  4. Step 4: Simplify right side
    8,115.25x = 49,155,474.11
  5. Step 5: Solve for x
    x = 49,155,474.11/8,115.25
  6. Step 6: Final answer
    x = 6,057.17

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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.