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Finding the Fourth Proportional to 8,855.61, 13,279.18 and 5,158.89

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Solution

The fourth proportional to 8,855.61, 13,279.18 and 5,158.89 is: 7,735.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,855.61 : 13,279.18 = 5,158.89 : x
  2. Step 2: Convert to fraction form
    8,855.61/13,279.18 = 5,158.89/x
  3. Step 3: Cross multiply
    8,855.61x = 13,279.18 × 5,158.89
  4. Step 4: Simplify right side
    8,855.61x = 68,505,828.91
  5. Step 5: Solve for x
    x = 68,505,828.91/8,855.61
  6. Step 6: Final answer
    x = 7,735.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.