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Finding the Fourth Proportional to 18,763.97, 28,145.42 and 4,723.97

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Solution

The fourth proportional to 18,763.97, 28,145.42 and 4,723.97 is: 7,085.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,763.97 : 28,145.42 = 4,723.97 : x
  2. Step 2: Convert to fraction form
    18,763.97/28,145.42 = 4,723.97/x
  3. Step 3: Cross multiply
    18,763.97x = 28,145.42 × 4,723.97
  4. Step 4: Simplify right side
    18,763.97x = 132,958,096.10
  5. Step 5: Solve for x
    x = 132,958,096.10/18,763.97
  6. Step 6: Final answer
    x = 7,085.82

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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.