Home / 5,109.75-7,660.45-2,645.28

Finding the Fourth Proportional to 5,109.75, 7,660.45 and 2,645.28

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Solution

The fourth proportional to 5,109.75, 7,660.45 and 2,645.28 is: 3,965.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,109.75 : 7,660.45 = 2,645.28 : x
  2. Step 2: Convert to fraction form
    5,109.75/7,660.45 = 2,645.28/x
  3. Step 3: Cross multiply
    5,109.75x = 7,660.45 × 2,645.28
  4. Step 4: Simplify right side
    5,109.75x = 20,264,009.76
  5. Step 5: Solve for x
    x = 20,264,009.76/5,109.75
  6. Step 6: Final answer
    x = 3,965.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.