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Finding the Fourth Proportional to 11,390.52, 17,085.78 and 10,388.28

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Solution

The fourth proportional to 11,390.52, 17,085.78 and 10,388.28 is: 15,582.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,390.52 : 17,085.78 = 10,388.28 : x
  2. Step 2: Convert to fraction form
    11,390.52/17,085.78 = 10,388.28/x
  3. Step 3: Cross multiply
    11,390.52x = 17,085.78 × 10,388.28
  4. Step 4: Simplify right side
    11,390.52x = 177,491,866.66
  5. Step 5: Solve for x
    x = 177,491,866.66/11,390.52
  6. Step 6: Final answer
    x = 15,582.42

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Similar ratio
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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.