Home / 31,431.42-47,163.15-20,908.85

Finding the Fourth Proportional to 31,431.42, 47,163.15 and 20,908.85

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Solution

The fourth proportional to 31,431.42, 47,163.15 and 20,908.85 is: 31,373.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,431.42 : 47,163.15 = 20,908.85 : x
  2. Step 2: Convert to fraction form
    31,431.42/47,163.15 = 20,908.85/x
  3. Step 3: Cross multiply
    31,431.42x = 47,163.15 × 20,908.85
  4. Step 4: Simplify right side
    31,431.42x = 986,126,993.06
  5. Step 5: Solve for x
    x = 986,126,993.06/31,431.42
  6. Step 6: Final answer
    x = 31,373.92

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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.