Home / 21,150.26-29,185.11-11,717.90

Finding the Fourth Proportional to 21,150.26, 29,185.11 and 11,717.90

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Solution

The fourth proportional to 21,150.26, 29,185.11 and 11,717.90 is: 16,169.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,150.26 : 29,185.11 = 11,717.90 : x
  2. Step 2: Convert to fraction form
    21,150.26/29,185.11 = 11,717.90/x
  3. Step 3: Cross multiply
    21,150.26x = 29,185.11 × 11,717.90
  4. Step 4: Simplify right side
    21,150.26x = 341,988,200.47
  5. Step 5: Solve for x
    x = 341,988,200.47/21,150.26
  6. Step 6: Final answer
    x = 16,169.46

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1.5x scale

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.