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Finding the Fourth Proportional to 18,907.62, 28,365.52 and 5,761.01

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Solution

The fourth proportional to 18,907.62, 28,365.52 and 5,761.01 is: 8,642.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,907.62 : 28,365.52 = 5,761.01 : x
  2. Step 2: Convert to fraction form
    18,907.62/28,365.52 = 5,761.01/x
  3. Step 3: Cross multiply
    18,907.62x = 28,365.52 × 5,761.01
  4. Step 4: Simplify right side
    18,907.62x = 163,414,044.38
  5. Step 5: Solve for x
    x = 163,414,044.38/18,907.62
  6. Step 6: Final answer
    x = 8,642.76

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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.