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Finding the Fourth Proportional to 18,874.81, 28,315.86 and 10,119.52

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Solution

The fourth proportional to 18,874.81, 28,315.86 and 10,119.52 is: 15,181.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,874.81 : 28,315.86 = 10,119.52 : x
  2. Step 2: Convert to fraction form
    18,874.81/28,315.86 = 10,119.52/x
  3. Step 3: Cross multiply
    18,874.81x = 28,315.86 × 10,119.52
  4. Step 4: Simplify right side
    18,874.81x = 286,542,911.59
  5. Step 5: Solve for x
    x = 286,542,911.59/18,874.81
  6. Step 6: Final answer
    x = 15,181.23

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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.