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Finding the Fourth Proportional to 6,078.76, 8,392.62 and 3,722.20

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Solution

The fourth proportional to 6,078.76, 8,392.62 and 3,722.20 is: 5,139.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,078.76 : 8,392.62 = 3,722.20 : x
  2. Step 2: Convert to fraction form
    6,078.76/8,392.62 = 3,722.20/x
  3. Step 3: Cross multiply
    6,078.76x = 8,392.62 × 3,722.20
  4. Step 4: Simplify right side
    6,078.76x = 31,239,010.16
  5. Step 5: Solve for x
    x = 31,239,010.16/6,078.76
  6. Step 6: Final answer
    x = 5,139.04

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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.