Home / 3,138.56-4,331.08-1,722.32

Finding the Fourth Proportional to 3,138.56, 4,331.08 and 1,722.32

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Solution

The fourth proportional to 3,138.56, 4,331.08 and 1,722.32 is: 2,376.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.56 : 4,331.08 = 1,722.32 : x
  2. Step 2: Convert to fraction form
    3,138.56/4,331.08 = 1,722.32/x
  3. Step 3: Cross multiply
    3,138.56x = 4,331.08 × 1,722.32
  4. Step 4: Simplify right side
    3,138.56x = 7,459,505.71
  5. Step 5: Solve for x
    x = 7,459,505.71/3,138.56
  6. Step 6: Final answer
    x = 2,376.73

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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.