Home / 5,115.14-7,058.64-3,129.02

Finding the Fourth Proportional to 5,115.14, 7,058.64 and 3,129.02

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Solution

The fourth proportional to 5,115.14, 7,058.64 and 3,129.02 is: 4,317.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,115.14 : 7,058.64 = 3,129.02 : x
  2. Step 2: Convert to fraction form
    5,115.14/7,058.64 = 3,129.02/x
  3. Step 3: Cross multiply
    5,115.14x = 7,058.64 × 3,129.02
  4. Step 4: Simplify right side
    5,115.14x = 22,086,625.73
  5. Step 5: Solve for x
    x = 22,086,625.73/5,115.14
  6. Step 6: Final answer
    x = 4,317.89

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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.