Home / 21,576.77-29,775.96-12,145.55

Finding the Fourth Proportional to 21,576.77, 29,775.96 and 12,145.55

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Solution

The fourth proportional to 21,576.77, 29,775.96 and 12,145.55 is: 16,760.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,576.77 : 29,775.96 = 12,145.55 : x
  2. Step 2: Convert to fraction form
    21,576.77/29,775.96 = 12,145.55/x
  3. Step 3: Cross multiply
    21,576.77x = 29,775.96 × 12,145.55
  4. Step 4: Simplify right side
    21,576.77x = 361,645,410.98
  5. Step 5: Solve for x
    x = 361,645,410.98/21,576.77
  6. Step 6: Final answer
    x = 16,760.87

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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.