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Finding the Fourth Proportional to 6,391.66, 8,818.43 and 3,872.97

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Solution

The fourth proportional to 6,391.66, 8,818.43 and 3,872.97 is: 5,343.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,391.66 : 8,818.43 = 3,872.97 : x
  2. Step 2: Convert to fraction form
    6,391.66/8,818.43 = 3,872.97/x
  3. Step 3: Cross multiply
    6,391.66x = 8,818.43 × 3,872.97
  4. Step 4: Simplify right side
    6,391.66x = 34,153,514.84
  5. Step 5: Solve for x
    x = 34,153,514.84/6,391.66
  6. Step 6: Final answer
    x = 5,343.45

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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.