Home / 5,145.45-7,100.75-2,787.59

Finding the Fourth Proportional to 5,145.45, 7,100.75 and 2,787.59

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Solution

The fourth proportional to 5,145.45, 7,100.75 and 2,787.59 is: 3,846.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,145.45 : 7,100.75 = 2,787.59 : x
  2. Step 2: Convert to fraction form
    5,145.45/7,100.75 = 2,787.59/x
  3. Step 3: Cross multiply
    5,145.45x = 7,100.75 × 2,787.59
  4. Step 4: Simplify right side
    5,145.45x = 19,793,977.79
  5. Step 5: Solve for x
    x = 19,793,977.79/5,145.45
  6. Step 6: Final answer
    x = 3,846.89

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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.