Home / 5,147.60-7,103.70-2,789.74

Finding the Fourth Proportional to 5,147.60, 7,103.70 and 2,789.74

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Solution

The fourth proportional to 5,147.60, 7,103.70 and 2,789.74 is: 3,849.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,147.60 : 7,103.70 = 2,789.74 : x
  2. Step 2: Convert to fraction form
    5,147.60/7,103.70 = 2,789.74/x
  3. Step 3: Cross multiply
    5,147.60x = 7,103.70 × 2,789.74
  4. Step 4: Simplify right side
    5,147.60x = 19,817,476.04
  5. Step 5: Solve for x
    x = 19,817,476.04/5,147.60
  6. Step 6: Final answer
    x = 3,849.85

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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.