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Finding the Fourth Proportional to 18,873.81, 28,314.36 and 10,118.52

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Solution

The fourth proportional to 18,873.81, 28,314.36 and 10,118.52 is: 15,179.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,873.81 : 28,314.36 = 10,118.52 : x
  2. Step 2: Convert to fraction form
    18,873.81/28,314.36 = 10,118.52/x
  3. Step 3: Cross multiply
    18,873.81x = 28,314.36 × 10,118.52
  4. Step 4: Simplify right side
    18,873.81x = 286,499,417.95
  5. Step 5: Solve for x
    x = 286,499,417.95/18,873.81
  6. Step 6: Final answer
    x = 15,179.73

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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.