Home / 5,145.12-7,100.31-2,787.26

Finding the Fourth Proportional to 5,145.12, 7,100.31 and 2,787.26

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Solution

The fourth proportional to 5,145.12, 7,100.31 and 2,787.26 is: 3,846.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,145.12 : 7,100.31 = 2,787.26 : x
  2. Step 2: Convert to fraction form
    5,145.12/7,100.31 = 2,787.26/x
  3. Step 3: Cross multiply
    5,145.12x = 7,100.31 × 2,787.26
  4. Step 4: Simplify right side
    5,145.12x = 19,790,409.26
  5. Step 5: Solve for x
    x = 19,790,409.26/5,145.12
  6. Step 6: Final answer
    x = 3,846.44

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1.5x scale

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.