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Finding the Fourth Proportional to 18,722.47, 28,061.07 and 8,187.97

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Solution

The fourth proportional to 18,722.47, 28,061.07 and 8,187.97 is: 12,272.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,722.47 : 28,061.07 = 8,187.97 : x
  2. Step 2: Convert to fraction form
    18,722.47/28,061.07 = 8,187.97/x
  3. Step 3: Cross multiply
    18,722.47x = 28,061.07 × 8,187.97
  4. Step 4: Simplify right side
    18,722.47x = 229,763,199.33
  5. Step 5: Solve for x
    x = 229,763,199.33/18,722.47
  6. Step 6: Final answer
    x = 12,272.06

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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.