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Finding the Fourth Proportional to 13,391.71, 18,481.10 and 7,423.25

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Solution

The fourth proportional to 13,391.71, 18,481.10 and 7,423.25 is: 10,244.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,391.71 : 18,481.10 = 7,423.25 : x
  2. Step 2: Convert to fraction form
    13,391.71/18,481.10 = 7,423.25/x
  3. Step 3: Cross multiply
    13,391.71x = 18,481.10 × 7,423.25
  4. Step 4: Simplify right side
    13,391.71x = 137,189,696.05
  5. Step 5: Solve for x
    x = 137,189,696.05/13,391.71
  6. Step 6: Final answer
    x = 10,244.38

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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.