Home / 20,605.40-30,908.21-8,756.12

Finding the Fourth Proportional to 20,605.40, 30,908.21 and 8,756.12

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Solution

The fourth proportional to 20,605.40, 30,908.21 and 8,756.12 is: 13,134.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,605.40 : 30,908.21 = 8,756.12 : x
  2. Step 2: Convert to fraction form
    20,605.40/30,908.21 = 8,756.12/x
  3. Step 3: Cross multiply
    20,605.40x = 30,908.21 × 8,756.12
  4. Step 4: Simplify right side
    20,605.40x = 270,635,951.96
  5. Step 5: Solve for x
    x = 270,635,951.96/20,605.40
  6. Step 6: Final answer
    x = 13,134.22

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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.