Home / 20,677.40-31,021.30-6,638.68

Finding the Fourth Proportional to 20,677.40, 31,021.30 and 6,638.68

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Solution

The fourth proportional to 20,677.40, 31,021.30 and 6,638.68 is: 9,959.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,677.40 : 31,021.30 = 6,638.68 : x
  2. Step 2: Convert to fraction form
    20,677.40/31,021.30 = 6,638.68/x
  3. Step 3: Cross multiply
    20,677.40x = 31,021.30 × 6,638.68
  4. Step 4: Simplify right side
    20,677.40x = 205,940,493.62
  5. Step 5: Solve for x
    x = 205,940,493.62/20,677.40
  6. Step 6: Final answer
    x = 9,959.69

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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.