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Finding the Fourth Proportional to 9,885.62, 13,643.08 and 5,906.65

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Solution

The fourth proportional to 9,885.62, 13,643.08 and 5,906.65 is: 8,151.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,885.62 : 13,643.08 = 5,906.65 : x
  2. Step 2: Convert to fraction form
    9,885.62/13,643.08 = 5,906.65/x
  3. Step 3: Cross multiply
    9,885.62x = 13,643.08 × 5,906.65
  4. Step 4: Simplify right side
    9,885.62x = 80,584,870.04
  5. Step 5: Solve for x
    x = 80,584,870.04/9,885.62
  6. Step 6: Final answer
    x = 8,151.73

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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.