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Finding the Fourth Proportional to 6,391.38, 8,820.10 and 3,596.88

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Solution

The fourth proportional to 6,391.38, 8,820.10 and 3,596.88 is: 4,963.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,391.38 : 8,820.10 = 3,596.88 : x
  2. Step 2: Convert to fraction form
    6,391.38/8,820.10 = 3,596.88/x
  3. Step 3: Cross multiply
    6,391.38x = 8,820.10 × 3,596.88
  4. Step 4: Simplify right side
    6,391.38x = 31,724,841.29
  5. Step 5: Solve for x
    x = 31,724,841.29/6,391.38
  6. Step 6: Final answer
    x = 4,963.69

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Half scale
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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.