Home / 20,921.04-31,381.83-6,882.17

Finding the Fourth Proportional to 20,921.04, 31,381.83 and 6,882.17

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Solution

The fourth proportional to 20,921.04, 31,381.83 and 6,882.17 is: 10,323.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,921.04 : 31,381.83 = 6,882.17 : x
  2. Step 2: Convert to fraction form
    20,921.04/31,381.83 = 6,882.17/x
  3. Step 3: Cross multiply
    20,921.04x = 31,381.83 × 6,882.17
  4. Step 4: Simplify right side
    20,921.04x = 215,974,932.06
  5. Step 5: Solve for x
    x = 215,974,932.06/20,921.04
  6. Step 6: Final answer
    x = 10,323.34

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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.