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Finding the Fourth Proportional to 18,783.44, 28,175.08 and 4,743.52

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Solution

The fourth proportional to 18,783.44, 28,175.08 and 4,743.52 is: 7,115.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,783.44 : 28,175.08 = 4,743.52 : x
  2. Step 2: Convert to fraction form
    18,783.44/28,175.08 = 4,743.52/x
  3. Step 3: Cross multiply
    18,783.44x = 28,175.08 × 4,743.52
  4. Step 4: Simplify right side
    18,783.44x = 133,649,055.48
  5. Step 5: Solve for x
    x = 133,649,055.48/18,783.44
  6. Step 6: Final answer
    x = 7,115.26

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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.