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Finding the Fourth Proportional to 18,718.43, 28,073.84 and 6,868.17

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Solution

The fourth proportional to 18,718.43, 28,073.84 and 6,868.17 is: 10,300.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,718.43 : 28,073.84 = 6,868.17 : x
  2. Step 2: Convert to fraction form
    18,718.43/28,073.84 = 6,868.17/x
  3. Step 3: Cross multiply
    18,718.43x = 28,073.84 × 6,868.17
  4. Step 4: Simplify right side
    18,718.43x = 192,815,871.33
  5. Step 5: Solve for x
    x = 192,815,871.33/18,718.43
  6. Step 6: Final answer
    x = 10,300.86

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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.