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Finding the Fourth Proportional to 6,718.80, 10,078.20 and 3,608.40

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Solution

The fourth proportional to 6,718.80, 10,078.20 and 3,608.40 is: 5,412.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,718.80 : 10,078.20 = 3,608.40 : x
  2. Step 2: Convert to fraction form
    6,718.80/10,078.20 = 3,608.40/x
  3. Step 3: Cross multiply
    6,718.80x = 10,078.20 × 3,608.40
  4. Step 4: Simplify right side
    6,718.80x = 36,366,176.88
  5. Step 5: Solve for x
    x = 36,366,176.88/6,718.80
  6. Step 6: Final answer
    x = 5,412.60

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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.