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Finding the Fourth Proportional to 15,081.42, 20,812.90 and 11,297.90

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Solution

The fourth proportional to 15,081.42, 20,812.90 and 11,297.90 is: 15,591.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,081.42 : 20,812.90 = 11,297.90 : x
  2. Step 2: Convert to fraction form
    15,081.42/20,812.90 = 11,297.90/x
  3. Step 3: Cross multiply
    15,081.42x = 20,812.90 × 11,297.90
  4. Step 4: Simplify right side
    15,081.42x = 235,142,062.91
  5. Step 5: Solve for x
    x = 235,142,062.91/15,081.42
  6. Step 6: Final answer
    x = 15,591.51

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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.