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Finding the Fourth Proportional to 18,944.75, 28,421.18 and 7,257.94

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Solution

The fourth proportional to 18,944.75, 28,421.18 and 7,257.94 is: 10,888.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,944.75 : 28,421.18 = 7,257.94 : x
  2. Step 2: Convert to fraction form
    18,944.75/28,421.18 = 7,257.94/x
  3. Step 3: Cross multiply
    18,944.75x = 28,421.18 × 7,257.94
  4. Step 4: Simplify right side
    18,944.75x = 206,279,139.04
  5. Step 5: Solve for x
    x = 206,279,139.04/18,944.75
  6. Step 6: Final answer
    x = 10,888.46

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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.