Home / 5,145.40-7,716.72-2,547.64

Finding the Fourth Proportional to 5,145.40, 7,716.72 and 2,547.64

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Solution

The fourth proportional to 5,145.40, 7,716.72 and 2,547.64 is: 3,820.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,145.40 : 7,716.72 = 2,547.64 : x
  2. Step 2: Convert to fraction form
    5,145.40/7,716.72 = 2,547.64/x
  3. Step 3: Cross multiply
    5,145.40x = 7,716.72 × 2,547.64
  4. Step 4: Simplify right side
    5,145.40x = 19,659,424.54
  5. Step 5: Solve for x
    x = 19,659,424.54/5,145.40
  6. Step 6: Final answer
    x = 3,820.78

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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.