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Finding the Fourth Proportional to 28,719.65, 43,100.54 and 18,855.47

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Solution

The fourth proportional to 28,719.65, 43,100.54 and 18,855.47 is: 28,297.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,719.65 : 43,100.54 = 18,855.47 : x
  2. Step 2: Convert to fraction form
    28,719.65/43,100.54 = 18,855.47/x
  3. Step 3: Cross multiply
    28,719.65x = 43,100.54 × 18,855.47
  4. Step 4: Simplify right side
    28,719.65x = 812,680,629.17
  5. Step 5: Solve for x
    x = 812,680,629.17/28,719.65
  6. Step 6: Final answer
    x = 28,297.03

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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.