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Finding the Fourth Proportional to 13,438.60, 18,544.36 and 7,469.88

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Solution

The fourth proportional to 13,438.60, 18,544.36 and 7,469.88 is: 10,307.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,438.60 : 18,544.36 = 7,469.88 : x
  2. Step 2: Convert to fraction form
    13,438.60/18,544.36 = 7,469.88/x
  3. Step 3: Cross multiply
    13,438.60x = 18,544.36 × 7,469.88
  4. Step 4: Simplify right side
    13,438.60x = 138,524,143.88
  5. Step 5: Solve for x
    x = 138,524,143.88/13,438.60
  6. Step 6: Final answer
    x = 10,307.93

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1.5x scale

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.