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Finding the Fourth Proportional to 8,321.87, 12,483.09 and 3,639.49

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Solution

The fourth proportional to 8,321.87, 12,483.09 and 3,639.49 is: 5,459.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,321.87 : 12,483.09 = 3,639.49 : x
  2. Step 2: Convert to fraction form
    8,321.87/12,483.09 = 3,639.49/x
  3. Step 3: Cross multiply
    8,321.87x = 12,483.09 × 3,639.49
  4. Step 4: Simplify right side
    8,321.87x = 45,432,050.02
  5. Step 5: Solve for x
    x = 45,432,050.02/8,321.87
  6. Step 6: Final answer
    x = 5,459.35

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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.