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Finding the Fourth Proportional to 8,568.40, 12,852.60 and 3,960.40

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Solution

The fourth proportional to 8,568.40, 12,852.60 and 3,960.40 is: 5,940.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,568.40 : 12,852.60 = 3,960.40 : x
  2. Step 2: Convert to fraction form
    8,568.40/12,852.60 = 3,960.40/x
  3. Step 3: Cross multiply
    8,568.40x = 12,852.60 × 3,960.40
  4. Step 4: Simplify right side
    8,568.40x = 50,901,437.04
  5. Step 5: Solve for x
    x = 50,901,437.04/8,568.40
  6. Step 6: Final answer
    x = 5,940.60

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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.