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Finding the Fourth Proportional to 11,396.88, 15,720.02 and 9,902.24

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Solution

The fourth proportional to 11,396.88, 15,720.02 and 9,902.24 is: 13,658.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,396.88 : 15,720.02 = 9,902.24 : x
  2. Step 2: Convert to fraction form
    11,396.88/15,720.02 = 9,902.24/x
  3. Step 3: Cross multiply
    11,396.88x = 15,720.02 × 9,902.24
  4. Step 4: Simplify right side
    11,396.88x = 155,663,282.73
  5. Step 5: Solve for x
    x = 155,663,282.73/11,396.88
  6. Step 6: Final answer
    x = 13,658.41

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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.