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Finding the Fourth Proportional to 15,169.20, 20,933.18 and 8,454.80

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Solution

The fourth proportional to 15,169.20, 20,933.18 and 8,454.80 is: 11,667.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,169.20 : 20,933.18 = 8,454.80 : x
  2. Step 2: Convert to fraction form
    15,169.20/20,933.18 = 8,454.80/x
  3. Step 3: Cross multiply
    15,169.20x = 20,933.18 × 8,454.80
  4. Step 4: Simplify right side
    15,169.20x = 176,985,850.26
  5. Step 5: Solve for x
    x = 176,985,850.26/15,169.20
  6. Step 6: Final answer
    x = 11,667.45

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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.