Home / 8,218.28-12,321.63-2,880.15

Finding the Fourth Proportional to 8,218.28, 12,321.63 and 2,880.15

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Solution

The fourth proportional to 8,218.28, 12,321.63 and 2,880.15 is: 4,318.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,218.28 : 12,321.63 = 2,880.15 : x
  2. Step 2: Convert to fraction form
    8,218.28/12,321.63 = 2,880.15/x
  3. Step 3: Cross multiply
    8,218.28x = 12,321.63 × 2,880.15
  4. Step 4: Simplify right side
    8,218.28x = 35,488,142.64
  5. Step 5: Solve for x
    x = 35,488,142.64/8,218.28
  6. Step 6: Final answer
    x = 4,318.20

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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.