Home / 5,790.78-7,991.22-3,138.18

Finding the Fourth Proportional to 5,790.78, 7,991.22 and 3,138.18

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Solution

The fourth proportional to 5,790.78, 7,991.22 and 3,138.18 is: 4,330.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,790.78 : 7,991.22 = 3,138.18 : x
  2. Step 2: Convert to fraction form
    5,790.78/7,991.22 = 3,138.18/x
  3. Step 3: Cross multiply
    5,790.78x = 7,991.22 × 3,138.18
  4. Step 4: Simplify right side
    5,790.78x = 25,077,886.78
  5. Step 5: Solve for x
    x = 25,077,886.78/5,790.78
  6. Step 6: Final answer
    x = 4,330.66

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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.