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Finding the Fourth Proportional to 18,723.44, 28,074.58 and 7,617.13

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Solution

The fourth proportional to 18,723.44, 28,074.58 and 7,617.13 is: 11,421.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,723.44 : 28,074.58 = 7,617.13 : x
  2. Step 2: Convert to fraction form
    18,723.44/28,074.58 = 7,617.13/x
  3. Step 3: Cross multiply
    18,723.44x = 28,074.58 × 7,617.13
  4. Step 4: Simplify right side
    18,723.44x = 213,847,725.56
  5. Step 5: Solve for x
    x = 213,847,725.56/18,723.44
  6. Step 6: Final answer
    x = 11,421.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.