Home / 5,129.80-7,078.98-3,140.52

Finding the Fourth Proportional to 5,129.80, 7,078.98 and 3,140.52

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Solution

The fourth proportional to 5,129.80, 7,078.98 and 3,140.52 is: 4,333.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,129.80 : 7,078.98 = 3,140.52 : x
  2. Step 2: Convert to fraction form
    5,129.80/7,078.98 = 3,140.52/x
  3. Step 3: Cross multiply
    5,129.80x = 7,078.98 × 3,140.52
  4. Step 4: Simplify right side
    5,129.80x = 22,231,678.27
  5. Step 5: Solve for x
    x = 22,231,678.27/5,129.80
  6. Step 6: Final answer
    x = 4,333.83

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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.