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Finding the Fourth Proportional to 15,176.67, 20,942.11 and 9,209.79

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Solution

The fourth proportional to 15,176.67, 20,942.11 and 9,209.79 is: 12,708.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,176.67 : 20,942.11 = 9,209.79 : x
  2. Step 2: Convert to fraction form
    15,176.67/20,942.11 = 9,209.79/x
  3. Step 3: Cross multiply
    15,176.67x = 20,942.11 × 9,209.79
  4. Step 4: Simplify right side
    15,176.67x = 192,872,435.26
  5. Step 5: Solve for x
    x = 192,872,435.26/15,176.67
  6. Step 6: Final answer
    x = 12,708.48

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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.