Home / 5,147.26-7,103.20-2,789.40

Finding the Fourth Proportional to 5,147.26, 7,103.20 and 2,789.40

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Solution

The fourth proportional to 5,147.26, 7,103.20 and 2,789.40 is: 3,849.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,147.26 : 7,103.20 = 2,789.40 : x
  2. Step 2: Convert to fraction form
    5,147.26/7,103.20 = 2,789.40/x
  3. Step 3: Cross multiply
    5,147.26x = 7,103.20 × 2,789.40
  4. Step 4: Simplify right side
    5,147.26x = 19,813,666.08
  5. Step 5: Solve for x
    x = 19,813,666.08/5,147.26
  6. Step 6: Final answer
    x = 3,849.36

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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.