Home / 3,877.84-5,815.72-2,645

Finding the Fourth Proportional to 3,877.84, 5,815.72 and 2,645

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Solution

The fourth proportional to 3,877.84, 5,815.72 and 2,645 is: 3,966.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,877.84 : 5,815.72 = 2,645 : x
  2. Step 2: Convert to fraction form
    3,877.84/5,815.72 = 2,645/x
  3. Step 3: Cross multiply
    3,877.84x = 5,815.72 × 2,645
  4. Step 4: Simplify right side
    3,877.84x = 15,382,579.40
  5. Step 5: Solve for x
    x = 15,382,579.40/3,877.84
  6. Step 6: Final answer
    x = 3,966.79

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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.