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Finding the Fourth Proportional to 12,551.99, 18,828.12 and 3,786.98

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Solution

The fourth proportional to 12,551.99, 18,828.12 and 3,786.98 is: 5,680.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,551.99 : 18,828.12 = 3,786.98 : x
  2. Step 2: Convert to fraction form
    12,551.99/18,828.12 = 3,786.98/x
  3. Step 3: Cross multiply
    12,551.99x = 18,828.12 × 3,786.98
  4. Step 4: Simplify right side
    12,551.99x = 71,301,600.80
  5. Step 5: Solve for x
    x = 71,301,600.80/12,551.99
  6. Step 6: Final answer
    x = 5,680.50

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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.