Home / 21,321.58-29,423.88-11,761.80

Finding the Fourth Proportional to 21,321.58, 29,423.88 and 11,761.80

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Solution

The fourth proportional to 21,321.58, 29,423.88 and 11,761.80 is: 16,231.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,321.58 : 29,423.88 = 11,761.80 : x
  2. Step 2: Convert to fraction form
    21,321.58/29,423.88 = 11,761.80/x
  3. Step 3: Cross multiply
    21,321.58x = 29,423.88 × 11,761.80
  4. Step 4: Simplify right side
    21,321.58x = 346,077,791.78
  5. Step 5: Solve for x
    x = 346,077,791.78/21,321.58
  6. Step 6: Final answer
    x = 16,231.34

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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.