Home / 20,780.69-31,171.14-5,989.69

Finding the Fourth Proportional to 20,780.69, 31,171.14 and 5,989.69

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Solution

The fourth proportional to 20,780.69, 31,171.14 and 5,989.69 is: 8,984.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,780.69 : 31,171.14 = 5,989.69 : x
  2. Step 2: Convert to fraction form
    20,780.69/31,171.14 = 5,989.69/x
  3. Step 3: Cross multiply
    20,780.69x = 31,171.14 × 5,989.69
  4. Step 4: Simplify right side
    20,780.69x = 186,705,387.62
  5. Step 5: Solve for x
    x = 186,705,387.62/20,780.69
  6. Step 6: Final answer
    x = 8,984.56

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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.