Home / 5,130.44-7,078.34-3,138.92

Finding the Fourth Proportional to 5,130.44, 7,078.34 and 3,138.92

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Solution

The fourth proportional to 5,130.44, 7,078.34 and 3,138.92 is: 4,330.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,130.44 : 7,078.34 = 3,138.92 : x
  2. Step 2: Convert to fraction form
    5,130.44/7,078.34 = 3,138.92/x
  3. Step 3: Cross multiply
    5,130.44x = 7,078.34 × 3,138.92
  4. Step 4: Simplify right side
    5,130.44x = 22,218,291.91
  5. Step 5: Solve for x
    x = 22,218,291.91/5,130.44
  6. Step 6: Final answer
    x = 4,330.68

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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.