Home / 20,981.27-31,476.53-6,945.68

Finding the Fourth Proportional to 20,981.27, 31,476.53 and 6,945.68

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Solution

The fourth proportional to 20,981.27, 31,476.53 and 6,945.68 is: 10,420.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,981.27 : 31,476.53 = 6,945.68 : x
  2. Step 2: Convert to fraction form
    20,981.27/31,476.53 = 6,945.68/x
  3. Step 3: Cross multiply
    20,981.27x = 31,476.53 × 6,945.68
  4. Step 4: Simplify right side
    20,981.27x = 218,625,764.87
  5. Step 5: Solve for x
    x = 218,625,764.87/20,981.27
  6. Step 6: Final answer
    x = 10,420.05

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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.