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Finding the Fourth Proportional to 6,626.56, 9,142.32 and 3,971.92

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Solution

The fourth proportional to 6,626.56, 9,142.32 and 3,971.92 is: 5,479.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,626.56 : 9,142.32 = 3,971.92 : x
  2. Step 2: Convert to fraction form
    6,626.56/9,142.32 = 3,971.92/x
  3. Step 3: Cross multiply
    6,626.56x = 9,142.32 × 3,971.92
  4. Step 4: Simplify right side
    6,626.56x = 36,312,563.65
  5. Step 5: Solve for x
    x = 36,312,563.65/6,626.56
  6. Step 6: Final answer
    x = 5,479.85

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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.