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Finding the Fourth Proportional to 18,898.55, 28,342.74 and 5,747.39

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Solution

The fourth proportional to 18,898.55, 28,342.74 and 5,747.39 is: 8,619.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,898.55 : 28,342.74 = 5,747.39 : x
  2. Step 2: Convert to fraction form
    18,898.55/28,342.74 = 5,747.39/x
  3. Step 3: Cross multiply
    18,898.55x = 28,342.74 × 5,747.39
  4. Step 4: Simplify right side
    18,898.55x = 162,896,780.45
  5. Step 5: Solve for x
    x = 162,896,780.45/18,898.55
  6. Step 6: Final answer
    x = 8,619.54

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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.