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Finding the Fourth Proportional to 15,028.91, 20,739.39 and 8,314.55

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Solution

The fourth proportional to 15,028.91, 20,739.39 and 8,314.55 is: 11,473.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,028.91 : 20,739.39 = 8,314.55 : x
  2. Step 2: Convert to fraction form
    15,028.91/20,739.39 = 8,314.55/x
  3. Step 3: Cross multiply
    15,028.91x = 20,739.39 × 8,314.55
  4. Step 4: Simplify right side
    15,028.91x = 172,438,591.43
  5. Step 5: Solve for x
    x = 172,438,591.43/15,028.91
  6. Step 6: Final answer
    x = 11,473.80

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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.