Home / 20,921.58-31,380.75-6,882.03

Finding the Fourth Proportional to 20,921.58, 31,380.75 and 6,882.03

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Solution

The fourth proportional to 20,921.58, 31,380.75 and 6,882.03 is: 10,322.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,921.58 : 31,380.75 = 6,882.03 : x
  2. Step 2: Convert to fraction form
    20,921.58/31,380.75 = 6,882.03/x
  3. Step 3: Cross multiply
    20,921.58x = 31,380.75 × 6,882.03
  4. Step 4: Simplify right side
    20,921.58x = 215,963,262.92
  5. Step 5: Solve for x
    x = 215,963,262.92/20,921.58
  6. Step 6: Final answer
    x = 10,322.51

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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.