Home / 5,145.71-7,719.77-2,645.96

Finding the Fourth Proportional to 5,145.71, 7,719.77 and 2,645.96

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Solution

The fourth proportional to 5,145.71, 7,719.77 and 2,645.96 is: 3,969.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,145.71 : 7,719.77 = 2,645.96 : x
  2. Step 2: Convert to fraction form
    5,145.71/7,719.77 = 2,645.96/x
  3. Step 3: Cross multiply
    5,145.71x = 7,719.77 × 2,645.96
  4. Step 4: Simplify right side
    5,145.71x = 20,426,173.05
  5. Step 5: Solve for x
    x = 20,426,173.05/5,145.71
  6. Step 6: Final answer
    x = 3,969.55

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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.