Home / 20,997.42-31,497.27-8,515.59

Finding the Fourth Proportional to 20,997.42, 31,497.27 and 8,515.59

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Solution

The fourth proportional to 20,997.42, 31,497.27 and 8,515.59 is: 12,773.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,997.42 : 31,497.27 = 8,515.59 : x
  2. Step 2: Convert to fraction form
    20,997.42/31,497.27 = 8,515.59/x
  3. Step 3: Cross multiply
    20,997.42x = 31,497.27 × 8,515.59
  4. Step 4: Simplify right side
    20,997.42x = 268,217,837.44
  5. Step 5: Solve for x
    x = 268,217,837.44/20,997.42
  6. Step 6: Final answer
    x = 12,773.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.