Home / 20,739.92-28,621.68-11,309

Finding the Fourth Proportional to 20,739.92, 28,621.68 and 11,309

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Solution

The fourth proportional to 20,739.92, 28,621.68 and 11,309 is: 15,606.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739.92 : 28,621.68 = 11,309 : x
  2. Step 2: Convert to fraction form
    20,739.92/28,621.68 = 11,309/x
  3. Step 3: Cross multiply
    20,739.92x = 28,621.68 × 11,309
  4. Step 4: Simplify right side
    20,739.92x = 323,682,579.12
  5. Step 5: Solve for x
    x = 323,682,579.12/20,739.92
  6. Step 6: Final answer
    x = 15,606.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.