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Finding the Fourth Proportional to 20,339.92, 30,509.40 and 5,549.68

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Solution

The fourth proportional to 20,339.92, 30,509.40 and 5,549.68 is: 8,324.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,339.92 : 30,509.40 = 5,549.68 : x
  2. Step 2: Convert to fraction form
    20,339.92/30,509.40 = 5,549.68/x
  3. Step 3: Cross multiply
    20,339.92x = 30,509.40 × 5,549.68
  4. Step 4: Simplify right side
    20,339.92x = 169,317,406.99
  5. Step 5: Solve for x
    x = 169,317,406.99/20,339.92
  6. Step 6: Final answer
    x = 8,324.39

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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.