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Finding the Fourth Proportional to 18,649.40, 27,974.18 and 7,556.30

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Solution

The fourth proportional to 18,649.40, 27,974.18 and 7,556.30 is: 11,334.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,649.40 : 27,974.18 = 7,556.30 : x
  2. Step 2: Convert to fraction form
    18,649.40/27,974.18 = 7,556.30/x
  3. Step 3: Cross multiply
    18,649.40x = 27,974.18 × 7,556.30
  4. Step 4: Simplify right side
    18,649.40x = 211,381,296.33
  5. Step 5: Solve for x
    x = 211,381,296.33/18,649.40
  6. Step 6: Final answer
    x = 11,334.48

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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.