Home / 5,145.76-7,101.18-2,787.91

Finding the Fourth Proportional to 5,145.76, 7,101.18 and 2,787.91

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Solution

The fourth proportional to 5,145.76, 7,101.18 and 2,787.91 is: 3,847.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,145.76 : 7,101.18 = 2,787.91 : x
  2. Step 2: Convert to fraction form
    5,145.76/7,101.18 = 2,787.91/x
  3. Step 3: Cross multiply
    5,145.76x = 7,101.18 × 2,787.91
  4. Step 4: Simplify right side
    5,145.76x = 19,797,401.29
  5. Step 5: Solve for x
    x = 19,797,401.29/5,145.76
  6. Step 6: Final answer
    x = 3,847.32

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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.