Home / 20,987.49-31,481.25-6,943.74

Finding the Fourth Proportional to 20,987.49, 31,481.25 and 6,943.74

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Solution

The fourth proportional to 20,987.49, 31,481.25 and 6,943.74 is: 10,415.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,987.49 : 31,481.25 = 6,943.74 : x
  2. Step 2: Convert to fraction form
    20,987.49/31,481.25 = 6,943.74/x
  3. Step 3: Cross multiply
    20,987.49x = 31,481.25 × 6,943.74
  4. Step 4: Simplify right side
    20,987.49x = 218,597,614.88
  5. Step 5: Solve for x
    x = 218,597,614.88/20,987.49
  6. Step 6: Final answer
    x = 10,415.61

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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.