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Finding the Fourth Proportional to 6,279.60, 8,668.68 and 4,787.64

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Solution

The fourth proportional to 6,279.60, 8,668.68 and 4,787.64 is: 6,609.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,279.60 : 8,668.68 = 4,787.64 : x
  2. Step 2: Convert to fraction form
    6,279.60/8,668.68 = 4,787.64/x
  3. Step 3: Cross multiply
    6,279.60x = 8,668.68 × 4,787.64
  4. Step 4: Simplify right side
    6,279.60x = 41,502,519.12
  5. Step 5: Solve for x
    x = 41,502,519.12/6,279.60
  6. Step 6: Final answer
    x = 6,609.10

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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.