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Finding the Fourth Proportional to 18,898.44, 28,349.98 and 6,420.52

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Solution

The fourth proportional to 18,898.44, 28,349.98 and 6,420.52 is: 9,631.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,898.44 : 28,349.98 = 6,420.52 : x
  2. Step 2: Convert to fraction form
    18,898.44/28,349.98 = 6,420.52/x
  3. Step 3: Cross multiply
    18,898.44x = 28,349.98 × 6,420.52
  4. Step 4: Simplify right side
    18,898.44x = 182,021,613.59
  5. Step 5: Solve for x
    x = 182,021,613.59/18,898.44
  6. Step 6: Final answer
    x = 9,631.57

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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.