Home / 21,140.28-29,175.48-11,711.88

Finding the Fourth Proportional to 21,140.28, 29,175.48 and 11,711.88

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Solution

The fourth proportional to 21,140.28, 29,175.48 and 11,711.88 is: 16,163.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.28 : 29,175.48 = 11,711.88 : x
  2. Step 2: Convert to fraction form
    21,140.28/29,175.48 = 11,711.88/x
  3. Step 3: Cross multiply
    21,140.28x = 29,175.48 × 11,711.88
  4. Step 4: Simplify right side
    21,140.28x = 341,699,720.70
  5. Step 5: Solve for x
    x = 341,699,720.70/21,140.28
  6. Step 6: Final answer
    x = 16,163.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.