Home / 20,415.28-30,631.56-8,571.70

Finding the Fourth Proportional to 20,415.28, 30,631.56 and 8,571.70

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Solution

The fourth proportional to 20,415.28, 30,631.56 and 8,571.70 is: 12,861.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,415.28 : 30,631.56 = 8,571.70 : x
  2. Step 2: Convert to fraction form
    20,415.28/30,631.56 = 8,571.70/x
  3. Step 3: Cross multiply
    20,415.28x = 30,631.56 × 8,571.70
  4. Step 4: Simplify right side
    20,415.28x = 262,564,542.85
  5. Step 5: Solve for x
    x = 262,564,542.85/20,415.28
  6. Step 6: Final answer
    x = 12,861.18

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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.