Home / 5,135.40-7,090.92-3,147

Finding the Fourth Proportional to 5,135.40, 7,090.92 and 3,147

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Solution

The fourth proportional to 5,135.40, 7,090.92 and 3,147 is: 4,345.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,135.40 : 7,090.92 = 3,147 : x
  2. Step 2: Convert to fraction form
    5,135.40/7,090.92 = 3,147/x
  3. Step 3: Cross multiply
    5,135.40x = 7,090.92 × 3,147
  4. Step 4: Simplify right side
    5,135.40x = 22,315,125.24
  5. Step 5: Solve for x
    x = 22,315,125.24/5,135.40
  6. Step 6: Final answer
    x = 4,345.35

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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.