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Finding the Fourth Proportional to 18,964.75, 28,447.17 and 7,118.05

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Solution

The fourth proportional to 18,964.75, 28,447.17 and 7,118.05 is: 10,677.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,964.75 : 28,447.17 = 7,118.05 : x
  2. Step 2: Convert to fraction form
    18,964.75/28,447.17 = 7,118.05/x
  3. Step 3: Cross multiply
    18,964.75x = 28,447.17 × 7,118.05
  4. Step 4: Simplify right side
    18,964.75x = 202,488,378.42
  5. Step 5: Solve for x
    x = 202,488,378.42/18,964.75
  6. Step 6: Final answer
    x = 10,677.09

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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.