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Finding the Fourth Proportional to 19,136.56, 28,718.08 and 7,449.84

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Solution

The fourth proportional to 19,136.56, 28,718.08 and 7,449.84 is: 11,179.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,136.56 : 28,718.08 = 7,449.84 : x
  2. Step 2: Convert to fraction form
    19,136.56/28,718.08 = 7,449.84/x
  3. Step 3: Cross multiply
    19,136.56x = 28,718.08 × 7,449.84
  4. Step 4: Simplify right side
    19,136.56x = 213,945,101.11
  5. Step 5: Solve for x
    x = 213,945,101.11/19,136.56
  6. Step 6: Final answer
    x = 11,179.91

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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.