Home / 20,622.40-30,941.49-8,778.98

Finding the Fourth Proportional to 20,622.40, 30,941.49 and 8,778.98

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Solution

The fourth proportional to 20,622.40, 30,941.49 and 8,778.98 is: 13,171.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,622.40 : 30,941.49 = 8,778.98 : x
  2. Step 2: Convert to fraction form
    20,622.40/30,941.49 = 8,778.98/x
  3. Step 3: Cross multiply
    20,622.40x = 30,941.49 × 8,778.98
  4. Step 4: Simplify right side
    20,622.40x = 271,634,721.88
  5. Step 5: Solve for x
    x = 271,634,721.88/20,622.40
  6. Step 6: Final answer
    x = 13,171.83

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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.