Home / 20,279.92-30,429.60-9,886

Finding the Fourth Proportional to 20,279.92, 30,429.60 and 9,886

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Solution

The fourth proportional to 20,279.92, 30,429.60 and 9,886 is: 14,833.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,279.92 : 30,429.60 = 9,886 : x
  2. Step 2: Convert to fraction form
    20,279.92/30,429.60 = 9,886/x
  3. Step 3: Cross multiply
    20,279.92x = 30,429.60 × 9,886
  4. Step 4: Simplify right side
    20,279.92x = 300,827,025.60
  5. Step 5: Solve for x
    x = 300,827,025.60/20,279.92
  6. Step 6: Final answer
    x = 14,833.74

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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.