Home / 3,138.66-4,331.04-1,812.72

Finding the Fourth Proportional to 3,138.66, 4,331.04 and 1,812.72

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Solution

The fourth proportional to 3,138.66, 4,331.04 and 1,812.72 is: 2,501.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.66 : 4,331.04 = 1,812.72 : x
  2. Step 2: Convert to fraction form
    3,138.66/4,331.04 = 1,812.72/x
  3. Step 3: Cross multiply
    3,138.66x = 4,331.04 × 1,812.72
  4. Step 4: Simplify right side
    3,138.66x = 7,850,962.83
  5. Step 5: Solve for x
    x = 7,850,962.83/3,138.66
  6. Step 6: Final answer
    x = 2,501.37

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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.