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Finding the Fourth Proportional to 12,458.81, 18,685.02 and 3,691.67

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Solution

The fourth proportional to 12,458.81, 18,685.02 and 3,691.67 is: 5,536.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,458.81 : 18,685.02 = 3,691.67 : x
  2. Step 2: Convert to fraction form
    12,458.81/18,685.02 = 3,691.67/x
  3. Step 3: Cross multiply
    12,458.81x = 18,685.02 × 3,691.67
  4. Step 4: Simplify right side
    12,458.81x = 68,978,927.78
  5. Step 5: Solve for x
    x = 68,978,927.78/12,458.81
  6. Step 6: Final answer
    x = 5,536.56

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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.