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Finding the Fourth Proportional to 11,151.78, 15,375.99 and 9,636.63

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Solution

The fourth proportional to 11,151.78, 15,375.99 and 9,636.63 is: 13,286.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,151.78 : 15,375.99 = 9,636.63 : x
  2. Step 2: Convert to fraction form
    11,151.78/15,375.99 = 9,636.63/x
  3. Step 3: Cross multiply
    11,151.78x = 15,375.99 × 9,636.63
  4. Step 4: Simplify right side
    11,151.78x = 148,172,726.51
  5. Step 5: Solve for x
    x = 148,172,726.51/11,151.78
  6. Step 6: Final answer
    x = 13,286.91

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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.