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Finding the Fourth Proportional to 15,149.45, 20,907.84 and 8,867.09

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Solution

The fourth proportional to 15,149.45, 20,907.84 and 8,867.09 is: 12,237.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,149.45 : 20,907.84 = 8,867.09 : x
  2. Step 2: Convert to fraction form
    15,149.45/20,907.84 = 8,867.09/x
  3. Step 3: Cross multiply
    15,149.45x = 20,907.84 × 8,867.09
  4. Step 4: Simplify right side
    15,149.45x = 185,391,594.45
  5. Step 5: Solve for x
    x = 185,391,594.45/15,149.45
  6. Step 6: Final answer
    x = 12,237.52

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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.