Home / 5,145.24-7,100.42-2,787.40

Finding the Fourth Proportional to 5,145.24, 7,100.42 and 2,787.40

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Solution

The fourth proportional to 5,145.24, 7,100.42 and 2,787.40 is: 3,846.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,145.24 : 7,100.42 = 2,787.40 : x
  2. Step 2: Convert to fraction form
    5,145.24/7,100.42 = 2,787.40/x
  3. Step 3: Cross multiply
    5,145.24x = 7,100.42 × 2,787.40
  4. Step 4: Simplify right side
    5,145.24x = 19,791,710.71
  5. Step 5: Solve for x
    x = 19,791,710.71/5,145.24
  6. Step 6: Final answer
    x = 3,846.61

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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.