Home / 20,508.21-30,756.87-8,662.14

Finding the Fourth Proportional to 20,508.21, 30,756.87 and 8,662.14

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Solution

The fourth proportional to 20,508.21, 30,756.87 and 8,662.14 is: 12,990.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,508.21 : 30,756.87 = 8,662.14 : x
  2. Step 2: Convert to fraction form
    20,508.21/30,756.87 = 8,662.14/x
  3. Step 3: Cross multiply
    20,508.21x = 30,756.87 × 8,662.14
  4. Step 4: Simplify right side
    20,508.21x = 266,420,313.90
  5. Step 5: Solve for x
    x = 266,420,313.90/20,508.21
  6. Step 6: Final answer
    x = 12,990.91

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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.