Home / 5,129.61-7,079.37-3,141.48

Finding the Fourth Proportional to 5,129.61, 7,079.37 and 3,141.48

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Solution

The fourth proportional to 5,129.61, 7,079.37 and 3,141.48 is: 4,335.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,129.61 : 7,079.37 = 3,141.48 : x
  2. Step 2: Convert to fraction form
    5,129.61/7,079.37 = 3,141.48/x
  3. Step 3: Cross multiply
    5,129.61x = 7,079.37 × 3,141.48
  4. Step 4: Simplify right side
    5,129.61x = 22,239,699.27
  5. Step 5: Solve for x
    x = 22,239,699.27/5,129.61
  6. Step 6: Final answer
    x = 4,335.55

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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.