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Finding the Fourth Proportional to 8,758.64, 12,081.88 and 5,174.64

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Solution

The fourth proportional to 8,758.64, 12,081.88 and 5,174.64 is: 7,138.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,758.64 : 12,081.88 = 5,174.64 : x
  2. Step 2: Convert to fraction form
    8,758.64/12,081.88 = 5,174.64/x
  3. Step 3: Cross multiply
    8,758.64x = 12,081.88 × 5,174.64
  4. Step 4: Simplify right side
    8,758.64x = 62,519,379.52
  5. Step 5: Solve for x
    x = 62,519,379.52/8,758.64
  6. Step 6: Final answer
    x = 7,138.02

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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.