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Finding the Fourth Proportional to 18,851.81, 28,238.08 and 8,981.15

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Solution

The fourth proportional to 18,851.81, 28,238.08 and 8,981.15 is: 13,452.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,851.81 : 28,238.08 = 8,981.15 : x
  2. Step 2: Convert to fraction form
    18,851.81/28,238.08 = 8,981.15/x
  3. Step 3: Cross multiply
    18,851.81x = 28,238.08 × 8,981.15
  4. Step 4: Simplify right side
    18,851.81x = 253,610,432.19
  5. Step 5: Solve for x
    x = 253,610,432.19/18,851.81
  6. Step 6: Final answer
    x = 13,452.84

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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.