Home / 3,147.60-4,333.32-2,679.12

Finding the Fourth Proportional to 3,147.60, 4,333.32 and 2,679.12

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Solution

The fourth proportional to 3,147.60, 4,333.32 and 2,679.12 is: 3,688.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,147.60 : 4,333.32 = 2,679.12 : x
  2. Step 2: Convert to fraction form
    3,147.60/4,333.32 = 2,679.12/x
  3. Step 3: Cross multiply
    3,147.60x = 4,333.32 × 2,679.12
  4. Step 4: Simplify right side
    3,147.60x = 11,609,484.28
  5. Step 5: Solve for x
    x = 11,609,484.28/3,147.60
  6. Step 6: Final answer
    x = 3,688.36

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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.