Home / 8,387.78-11,575.73-5,550.19

Finding the Fourth Proportional to 8,387.78, 11,575.73 and 5,550.19

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Solution

The fourth proportional to 8,387.78, 11,575.73 and 5,550.19 is: 7,659.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,387.78 : 11,575.73 = 5,550.19 : x
  2. Step 2: Convert to fraction form
    8,387.78/11,575.73 = 5,550.19/x
  3. Step 3: Cross multiply
    8,387.78x = 11,575.73 × 5,550.19
  4. Step 4: Simplify right side
    8,387.78x = 64,247,485.82
  5. Step 5: Solve for x
    x = 64,247,485.82/8,387.78
  6. Step 6: Final answer
    x = 7,659.66

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Half scale
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Double scale
Find fourth proportional to 8,388.78, 11,577.11 and 5,551.19
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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.