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Finding the Fourth Proportional to 6,321.90, 8,723.85 and 3,488.70

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Solution

The fourth proportional to 6,321.90, 8,723.85 and 3,488.70 is: 4,814.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,321.90 : 8,723.85 = 3,488.70 : x
  2. Step 2: Convert to fraction form
    6,321.90/8,723.85 = 3,488.70/x
  3. Step 3: Cross multiply
    6,321.90x = 8,723.85 × 3,488.70
  4. Step 4: Simplify right side
    6,321.90x = 30,434,895.50
  5. Step 5: Solve for x
    x = 30,434,895.50/6,321.90
  6. Step 6: Final answer
    x = 4,814.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.