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Finding the Fourth Proportional to 15,119.39, 20,867.29 and 8,744.90

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Solution

The fourth proportional to 15,119.39, 20,867.29 and 8,744.90 is: 12,069.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,119.39 : 20,867.29 = 8,744.90 : x
  2. Step 2: Convert to fraction form
    15,119.39/20,867.29 = 8,744.90/x
  3. Step 3: Cross multiply
    15,119.39x = 20,867.29 × 8,744.90
  4. Step 4: Simplify right side
    15,119.39x = 182,482,238.12
  5. Step 5: Solve for x
    x = 182,482,238.12/15,119.39
  6. Step 6: Final answer
    x = 12,069.42

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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.