Home / 20,764.68-31,150.10-6,720

Finding the Fourth Proportional to 20,764.68, 31,150.10 and 6,720

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Solution

The fourth proportional to 20,764.68, 31,150.10 and 6,720 is: 10,081.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,764.68 : 31,150.10 = 6,720 : x
  2. Step 2: Convert to fraction form
    20,764.68/31,150.10 = 6,720/x
  3. Step 3: Cross multiply
    20,764.68x = 31,150.10 × 6,720
  4. Step 4: Simplify right side
    20,764.68x = 209,328,672
  5. Step 5: Solve for x
    x = 209,328,672/20,764.68
  6. Step 6: Final answer
    x = 10,081.00

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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.