Home / 21,266.46-31,878.96-11,910.96

Finding the Fourth Proportional to 21,266.46, 31,878.96 and 11,910.96

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Solution

The fourth proportional to 21,266.46, 31,878.96 and 11,910.96 is: 17,854.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,266.46 : 31,878.96 = 11,910.96 : x
  2. Step 2: Convert to fraction form
    21,266.46/31,878.96 = 11,910.96/x
  3. Step 3: Cross multiply
    21,266.46x = 31,878.96 × 11,910.96
  4. Step 4: Simplify right side
    21,266.46x = 379,709,017.40
  5. Step 5: Solve for x
    x = 379,709,017.40/21,266.46
  6. Step 6: Final answer
    x = 17,854.83

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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.