Home / 20,697.75-31,047.23-6,659.21

Finding the Fourth Proportional to 20,697.75, 31,047.23 and 6,659.21

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Solution

The fourth proportional to 20,697.75, 31,047.23 and 6,659.21 is: 9,989.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,697.75 : 31,047.23 = 6,659.21 : x
  2. Step 2: Convert to fraction form
    20,697.75/31,047.23 = 6,659.21/x
  3. Step 3: Cross multiply
    20,697.75x = 31,047.23 × 6,659.21
  4. Step 4: Simplify right side
    20,697.75x = 206,750,118.75
  5. Step 5: Solve for x
    x = 206,750,118.75/20,697.75
  6. Step 6: Final answer
    x = 9,989.01

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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.