Home / 20,770.68-31,161.21-5,979.57

Finding the Fourth Proportional to 20,770.68, 31,161.21 and 5,979.57

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Solution

The fourth proportional to 20,770.68, 31,161.21 and 5,979.57 is: 8,970.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,770.68 : 31,161.21 = 5,979.57 : x
  2. Step 2: Convert to fraction form
    20,770.68/31,161.21 = 5,979.57/x
  3. Step 3: Cross multiply
    20,770.68x = 31,161.21 × 5,979.57
  4. Step 4: Simplify right side
    20,770.68x = 186,330,636.48
  5. Step 5: Solve for x
    x = 186,330,636.48/20,770.68
  6. Step 6: Final answer
    x = 8,970.85

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1.5x scale

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.