Home / 21,247.26-29,321.78-11,687.40

Finding the Fourth Proportional to 21,247.26, 29,321.78 and 11,687.40

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Solution

The fourth proportional to 21,247.26, 29,321.78 and 11,687.40 is: 16,128.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,247.26 : 29,321.78 = 11,687.40 : x
  2. Step 2: Convert to fraction form
    21,247.26/29,321.78 = 11,687.40/x
  3. Step 3: Cross multiply
    21,247.26x = 29,321.78 × 11,687.40
  4. Step 4: Simplify right side
    21,247.26x = 342,695,254.44
  5. Step 5: Solve for x
    x = 342,695,254.44/21,247.26
  6. Step 6: Final answer
    x = 16,128.91

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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.