Home / 21,576.88-29,778.69-12,147.22

Finding the Fourth Proportional to 21,576.88, 29,778.69 and 12,147.22

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Solution

The fourth proportional to 21,576.88, 29,778.69 and 12,147.22 is: 16,764.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,576.88 : 29,778.69 = 12,147.22 : x
  2. Step 2: Convert to fraction form
    21,576.88/29,778.69 = 12,147.22/x
  3. Step 3: Cross multiply
    21,576.88x = 29,778.69 × 12,147.22
  4. Step 4: Simplify right side
    21,576.88x = 361,728,298.74
  5. Step 5: Solve for x
    x = 361,728,298.74/21,576.88
  6. Step 6: Final answer
    x = 16,764.62

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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.