Home / 5,129.82-7,079.28-3,140.34

Finding the Fourth Proportional to 5,129.82, 7,079.28 and 3,140.34

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Solution

The fourth proportional to 5,129.82, 7,079.28 and 3,140.34 is: 4,333.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,129.82 : 7,079.28 = 3,140.34 : x
  2. Step 2: Convert to fraction form
    5,129.82/7,079.28 = 3,140.34/x
  3. Step 3: Cross multiply
    5,129.82x = 7,079.28 × 3,140.34
  4. Step 4: Simplify right side
    5,129.82x = 22,231,346.16
  5. Step 5: Solve for x
    x = 22,231,346.16/5,129.82
  6. Step 6: Final answer
    x = 4,333.75

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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.