Home / 20,682.87-28,552.28-12,731.91

Finding the Fourth Proportional to 20,682.87, 28,552.28 and 12,731.91

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Solution

The fourth proportional to 20,682.87, 28,552.28 and 12,731.91 is: 17,576.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,682.87 : 28,552.28 = 12,731.91 : x
  2. Step 2: Convert to fraction form
    20,682.87/28,552.28 = 12,731.91/x
  3. Step 3: Cross multiply
    20,682.87x = 28,552.28 × 12,731.91
  4. Step 4: Simplify right side
    20,682.87x = 363,524,995.60
  5. Step 5: Solve for x
    x = 363,524,995.60/20,682.87
  6. Step 6: Final answer
    x = 17,576.14

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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.