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Finding the Fourth Proportional to 18,981.43, 28,489.43 and 10,104.22

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Solution

The fourth proportional to 18,981.43, 28,489.43 and 10,104.22 is: 15,165.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,981.43 : 28,489.43 = 10,104.22 : x
  2. Step 2: Convert to fraction form
    18,981.43/28,489.43 = 10,104.22/x
  3. Step 3: Cross multiply
    18,981.43x = 28,489.43 × 10,104.22
  4. Step 4: Simplify right side
    18,981.43x = 287,863,468.39
  5. Step 5: Solve for x
    x = 287,863,468.39/18,981.43
  6. Step 6: Final answer
    x = 15,165.53

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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.