Home / 10,142.28-15,212.94-3,121.98

Finding the Fourth Proportional to 10,142.28, 15,212.94 and 3,121.98

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Solution

The fourth proportional to 10,142.28, 15,212.94 and 3,121.98 is: 4,682.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,142.28 : 15,212.94 = 3,121.98 : x
  2. Step 2: Convert to fraction form
    10,142.28/15,212.94 = 3,121.98/x
  3. Step 3: Cross multiply
    10,142.28x = 15,212.94 × 3,121.98
  4. Step 4: Simplify right side
    10,142.28x = 47,494,494.42
  5. Step 5: Solve for x
    x = 47,494,494.42/10,142.28
  6. Step 6: Final answer
    x = 4,682.82

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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.