Home / 20,607.40-30,911.20-8,758.12

Finding the Fourth Proportional to 20,607.40, 30,911.20 and 8,758.12

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Solution

The fourth proportional to 20,607.40, 30,911.20 and 8,758.12 is: 13,137.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,607.40 : 30,911.20 = 8,758.12 : x
  2. Step 2: Convert to fraction form
    20,607.40/30,911.20 = 8,758.12/x
  3. Step 3: Cross multiply
    20,607.40x = 30,911.20 × 8,758.12
  4. Step 4: Simplify right side
    20,607.40x = 270,723,998.94
  5. Step 5: Solve for x
    x = 270,723,998.94/20,607.40
  6. Step 6: Final answer
    x = 13,137.22

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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.