Home / 20,716.84-31,231.43-19,380.52

Finding the Fourth Proportional to 20,716.84, 31,231.43 and 19,380.52

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Solution

The fourth proportional to 20,716.84, 31,231.43 and 19,380.52 is: 29,216.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,716.84 : 31,231.43 = 19,380.52 : x
  2. Step 2: Convert to fraction form
    20,716.84/31,231.43 = 19,380.52/x
  3. Step 3: Cross multiply
    20,716.84x = 31,231.43 × 19,380.52
  4. Step 4: Simplify right side
    20,716.84x = 605,281,353.74
  5. Step 5: Solve for x
    x = 605,281,353.74/20,716.84
  6. Step 6: Final answer
    x = 29,216.88

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.