Home / 13,820.37-20,730.49-3,959.64

Finding the Fourth Proportional to 13,820.37, 20,730.49 and 3,959.64

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Solution

The fourth proportional to 13,820.37, 20,730.49 and 3,959.64 is: 5,939.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,820.37 : 20,730.49 = 3,959.64 : x
  2. Step 2: Convert to fraction form
    13,820.37/20,730.49 = 3,959.64/x
  3. Step 3: Cross multiply
    13,820.37x = 20,730.49 × 3,959.64
  4. Step 4: Simplify right side
    13,820.37x = 82,085,277.42
  5. Step 5: Solve for x
    x = 82,085,277.42/13,820.37
  6. Step 6: Final answer
    x = 5,939.44

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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.