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Finding the Fourth Proportional to 6,368.72, 8,791.80 and 4,247.78

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Solution

The fourth proportional to 6,368.72, 8,791.80 and 4,247.78 is: 5,863.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,368.72 : 8,791.80 = 4,247.78 : x
  2. Step 2: Convert to fraction form
    6,368.72/8,791.80 = 4,247.78/x
  3. Step 3: Cross multiply
    6,368.72x = 8,791.80 × 4,247.78
  4. Step 4: Simplify right side
    6,368.72x = 37,345,632.20
  5. Step 5: Solve for x
    x = 37,345,632.20/6,368.72
  6. Step 6: Final answer
    x = 5,863.91

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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.