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Finding the Fourth Proportional to 13,615.52, 20,418.96 and 5,294.96

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Solution

The fourth proportional to 13,615.52, 20,418.96 and 5,294.96 is: 7,940.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,615.52 : 20,418.96 = 5,294.96 : x
  2. Step 2: Convert to fraction form
    13,615.52/20,418.96 = 5,294.96/x
  3. Step 3: Cross multiply
    13,615.52x = 20,418.96 × 5,294.96
  4. Step 4: Simplify right side
    13,615.52x = 108,117,576.44
  5. Step 5: Solve for x
    x = 108,117,576.44/13,615.52
  6. Step 6: Final answer
    x = 7,940.76

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1.5x scale

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.