Home / 21,178.43-31,770.40-6,388.84

Finding the Fourth Proportional to 21,178.43, 31,770.40 and 6,388.84

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Solution

The fourth proportional to 21,178.43, 31,770.40 and 6,388.84 is: 9,584.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,178.43 : 31,770.40 = 6,388.84 : x
  2. Step 2: Convert to fraction form
    21,178.43/31,770.40 = 6,388.84/x
  3. Step 3: Cross multiply
    21,178.43x = 31,770.40 × 6,388.84
  4. Step 4: Simplify right side
    21,178.43x = 202,976,002.34
  5. Step 5: Solve for x
    x = 202,976,002.34/21,178.43
  6. Step 6: Final answer
    x = 9,584.09

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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.