Home / 3,612.70-5,431.20-3,078.10

Finding the Fourth Proportional to 3,612.70, 5,431.20 and 3,078.10

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Solution

The fourth proportional to 3,612.70, 5,431.20 and 3,078.10 is: 4,627.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,612.70 : 5,431.20 = 3,078.10 : x
  2. Step 2: Convert to fraction form
    3,612.70/5,431.20 = 3,078.10/x
  3. Step 3: Cross multiply
    3,612.70x = 5,431.20 × 3,078.10
  4. Step 4: Simplify right side
    3,612.70x = 16,717,776.72
  5. Step 5: Solve for x
    x = 16,717,776.72/3,612.70
  6. Step 6: Final answer
    x = 4,627.50

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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.