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Finding the Fourth Proportional to 18,920.70, 28,337.94 and 9,067.08

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Solution

The fourth proportional to 18,920.70, 28,337.94 and 9,067.08 is: 13,579.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,920.70 : 28,337.94 = 9,067.08 : x
  2. Step 2: Convert to fraction form
    18,920.70/28,337.94 = 9,067.08/x
  3. Step 3: Cross multiply
    18,920.70x = 28,337.94 × 9,067.08
  4. Step 4: Simplify right side
    18,920.70x = 256,942,369.02
  5. Step 5: Solve for x
    x = 256,942,369.02/18,920.70
  6. Step 6: Final answer
    x = 13,579.96

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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.