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Finding the Fourth Proportional to 5,678.64, 8,514.81 and 2,387.97

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Solution

The fourth proportional to 5,678.64, 8,514.81 and 2,387.97 is: 3,580.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,678.64 : 8,514.81 = 2,387.97 : x
  2. Step 2: Convert to fraction form
    5,678.64/8,514.81 = 2,387.97/x
  3. Step 3: Cross multiply
    5,678.64x = 8,514.81 × 2,387.97
  4. Step 4: Simplify right side
    5,678.64x = 20,333,110.84
  5. Step 5: Solve for x
    x = 20,333,110.84/5,678.64
  6. Step 6: Final answer
    x = 3,580.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.