Home / 20,866.52-31,298.96-8,382.80

Finding the Fourth Proportional to 20,866.52, 31,298.96 and 8,382.80

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Solution

The fourth proportional to 20,866.52, 31,298.96 and 8,382.80 is: 12,573.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,866.52 : 31,298.96 = 8,382.80 : x
  2. Step 2: Convert to fraction form
    20,866.52/31,298.96 = 8,382.80/x
  3. Step 3: Cross multiply
    20,866.52x = 31,298.96 × 8,382.80
  4. Step 4: Simplify right side
    20,866.52x = 262,372,921.89
  5. Step 5: Solve for x
    x = 262,372,921.89/20,866.52
  6. Step 6: Final answer
    x = 12,573.87

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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.