Home / 20,550.85-30,830.90-6,511.72

Finding the Fourth Proportional to 20,550.85, 30,830.90 and 6,511.72

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Solution

The fourth proportional to 20,550.85, 30,830.90 and 6,511.72 is: 9,769.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,550.85 : 30,830.90 = 6,511.72 : x
  2. Step 2: Convert to fraction form
    20,550.85/30,830.90 = 6,511.72/x
  3. Step 3: Cross multiply
    20,550.85x = 30,830.90 × 6,511.72
  4. Step 4: Simplify right side
    20,550.85x = 200,762,188.15
  5. Step 5: Solve for x
    x = 200,762,188.15/20,550.85
  6. Step 6: Final answer
    x = 9,769.05

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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.