Home / 31,860.20-47,790.30-20,186.60

Finding the Fourth Proportional to 31,860.20, 47,790.30 and 20,186.60

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Solution

The fourth proportional to 31,860.20, 47,790.30 and 20,186.60 is: 30,279.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,860.20 : 47,790.30 = 20,186.60 : x
  2. Step 2: Convert to fraction form
    31,860.20/47,790.30 = 20,186.60/x
  3. Step 3: Cross multiply
    31,860.20x = 47,790.30 × 20,186.60
  4. Step 4: Simplify right side
    31,860.20x = 964,723,669.98
  5. Step 5: Solve for x
    x = 964,723,669.98/31,860.20
  6. Step 6: Final answer
    x = 30,279.90

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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.