Home / 20,805.17-31,209.47-6,764.87

Finding the Fourth Proportional to 20,805.17, 31,209.47 and 6,764.87

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Solution

The fourth proportional to 20,805.17, 31,209.47 and 6,764.87 is: 10,147.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,805.17 : 31,209.47 = 6,764.87 : x
  2. Step 2: Convert to fraction form
    20,805.17/31,209.47 = 6,764.87/x
  3. Step 3: Cross multiply
    20,805.17x = 31,209.47 × 6,764.87
  4. Step 4: Simplify right side
    20,805.17x = 211,128,007.32
  5. Step 5: Solve for x
    x = 211,128,007.32/20,805.17
  6. Step 6: Final answer
    x = 10,147.86

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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.