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Finding the Fourth Proportional to 9,221.62, 13,837.89 and 8,637.85

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Solution

The fourth proportional to 9,221.62, 13,837.89 and 8,637.85 is: 12,961.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,221.62 : 13,837.89 = 8,637.85 : x
  2. Step 2: Convert to fraction form
    9,221.62/13,837.89 = 8,637.85/x
  3. Step 3: Cross multiply
    9,221.62x = 13,837.89 × 8,637.85
  4. Step 4: Simplify right side
    9,221.62x = 119,529,618.14
  5. Step 5: Solve for x
    x = 119,529,618.14/9,221.62
  6. Step 6: Final answer
    x = 12,961.89

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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.