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Finding the Fourth Proportional to 18,920.97, 28,381.43 and 5,773.46

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Solution

The fourth proportional to 18,920.97, 28,381.43 and 5,773.46 is: 8,660.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,920.97 : 28,381.43 = 5,773.46 : x
  2. Step 2: Convert to fraction form
    18,920.97/28,381.43 = 5,773.46/x
  3. Step 3: Cross multiply
    18,920.97x = 28,381.43 × 5,773.46
  4. Step 4: Simplify right side
    18,920.97x = 163,858,923.37
  5. Step 5: Solve for x
    x = 163,858,923.37/18,920.97
  6. Step 6: Final answer
    x = 8,660.18

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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.