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Finding the Fourth Proportional to 18,895.78, 28,342.73 and 7,048.62

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Solution

The fourth proportional to 18,895.78, 28,342.73 and 7,048.62 is: 10,572.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,895.78 : 28,342.73 = 7,048.62 : x
  2. Step 2: Convert to fraction form
    18,895.78/28,342.73 = 7,048.62/x
  3. Step 3: Cross multiply
    18,895.78x = 28,342.73 × 7,048.62
  4. Step 4: Simplify right side
    18,895.78x = 199,777,098.29
  5. Step 5: Solve for x
    x = 199,777,098.29/18,895.78
  6. Step 6: Final answer
    x = 10,572.58

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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.