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Finding the Fourth Proportional to 13,438.66, 18,544.50 and 7,469.98

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Solution

The fourth proportional to 13,438.66, 18,544.50 and 7,469.98 is: 10,308.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,438.66 : 18,544.50 = 7,469.98 : x
  2. Step 2: Convert to fraction form
    13,438.66/18,544.50 = 7,469.98/x
  3. Step 3: Cross multiply
    13,438.66x = 18,544.50 × 7,469.98
  4. Step 4: Simplify right side
    13,438.66x = 138,527,044.11
  5. Step 5: Solve for x
    x = 138,527,044.11/13,438.66
  6. Step 6: Final answer
    x = 10,308.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.