Home / 5,129.34-7,078.52-2,891.26

Finding the Fourth Proportional to 5,129.34, 7,078.52 and 2,891.26

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Solution

The fourth proportional to 5,129.34, 7,078.52 and 2,891.26 is: 3,989.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,129.34 : 7,078.52 = 2,891.26 : x
  2. Step 2: Convert to fraction form
    5,129.34/7,078.52 = 2,891.26/x
  3. Step 3: Cross multiply
    5,129.34x = 7,078.52 × 2,891.26
  4. Step 4: Simplify right side
    5,129.34x = 20,465,841.74
  5. Step 5: Solve for x
    x = 20,465,841.74/5,129.34
  6. Step 6: Final answer
    x = 3,989.96

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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.