Home / 3,909.24-5,388.70-2,913

Finding the Fourth Proportional to 3,909.24, 5,388.70 and 2,913

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Solution

The fourth proportional to 3,909.24, 5,388.70 and 2,913 is: 4,015.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,909.24 : 5,388.70 = 2,913 : x
  2. Step 2: Convert to fraction form
    3,909.24/5,388.70 = 2,913/x
  3. Step 3: Cross multiply
    3,909.24x = 5,388.70 × 2,913
  4. Step 4: Simplify right side
    3,909.24x = 15,697,283.10
  5. Step 5: Solve for x
    x = 15,697,283.10/3,909.24
  6. Step 6: Final answer
    x = 4,015.43

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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.