Home / 20,935.68-31,409.76-8,449.28

Finding the Fourth Proportional to 20,935.68, 31,409.76 and 8,449.28

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Solution

The fourth proportional to 20,935.68, 31,409.76 and 8,449.28 is: 12,676.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,935.68 : 31,409.76 = 8,449.28 : x
  2. Step 2: Convert to fraction form
    20,935.68/31,409.76 = 8,449.28/x
  3. Step 3: Cross multiply
    20,935.68x = 31,409.76 × 8,449.28
  4. Step 4: Simplify right side
    20,935.68x = 265,389,856.97
  5. Step 5: Solve for x
    x = 265,389,856.97/20,935.68
  6. Step 6: Final answer
    x = 12,676.44

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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.