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Finding the Fourth Proportional to 18,901.68, 28,367.10 and 15,212.94

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Solution

The fourth proportional to 18,901.68, 28,367.10 and 15,212.94 is: 22,831.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,901.68 : 28,367.10 = 15,212.94 : x
  2. Step 2: Convert to fraction form
    18,901.68/28,367.10 = 15,212.94/x
  3. Step 3: Cross multiply
    18,901.68x = 28,367.10 × 15,212.94
  4. Step 4: Simplify right side
    18,901.68x = 431,546,990.27
  5. Step 5: Solve for x
    x = 431,546,990.27/18,901.68
  6. Step 6: Final answer
    x = 22,831.14

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.