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Finding the Fourth Proportional to 20,325.91, 30,483.39 and 5,531.31

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Solution

The fourth proportional to 20,325.91, 30,483.39 and 5,531.31 is: 8,295.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,325.91 : 30,483.39 = 5,531.31 : x
  2. Step 2: Convert to fraction form
    20,325.91/30,483.39 = 5,531.31/x
  3. Step 3: Cross multiply
    20,325.91x = 30,483.39 × 5,531.31
  4. Step 4: Simplify right side
    20,325.91x = 168,613,155.30
  5. Step 5: Solve for x
    x = 168,613,155.30/20,325.91
  6. Step 6: Final answer
    x = 8,295.48

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1.5x scale

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.