Home / 5,145.25-7,100.45-2,787.39

Finding the Fourth Proportional to 5,145.25, 7,100.45 and 2,787.39

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Solution

The fourth proportional to 5,145.25, 7,100.45 and 2,787.39 is: 3,846.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,145.25 : 7,100.45 = 2,787.39 : x
  2. Step 2: Convert to fraction form
    5,145.25/7,100.45 = 2,787.39/x
  3. Step 3: Cross multiply
    5,145.25x = 7,100.45 × 2,787.39
  4. Step 4: Simplify right side
    5,145.25x = 19,791,723.33
  5. Step 5: Solve for x
    x = 19,791,723.33/5,145.25
  6. Step 6: Final answer
    x = 3,846.60

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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.