Home / 20,685.66-31,025.55-6,643.87

Finding the Fourth Proportional to 20,685.66, 31,025.55 and 6,643.87

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Solution

The fourth proportional to 20,685.66, 31,025.55 and 6,643.87 is: 9,964.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,685.66 : 31,025.55 = 6,643.87 : x
  2. Step 2: Convert to fraction form
    20,685.66/31,025.55 = 6,643.87/x
  3. Step 3: Cross multiply
    20,685.66x = 31,025.55 × 6,643.87
  4. Step 4: Simplify right side
    20,685.66x = 206,129,720.88
  5. Step 5: Solve for x
    x = 206,129,720.88/20,685.66
  6. Step 6: Final answer
    x = 9,964.86

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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.