Home / 5,147.42-7,103.72-2,909.40

Finding the Fourth Proportional to 5,147.42, 7,103.72 and 2,909.40

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Solution

The fourth proportional to 5,147.42, 7,103.72 and 2,909.40 is: 4,015.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,147.42 : 7,103.72 = 2,909.40 : x
  2. Step 2: Convert to fraction form
    5,147.42/7,103.72 = 2,909.40/x
  3. Step 3: Cross multiply
    5,147.42x = 7,103.72 × 2,909.40
  4. Step 4: Simplify right side
    5,147.42x = 20,667,562.97
  5. Step 5: Solve for x
    x = 20,667,562.97/5,147.42
  6. Step 6: Final answer
    x = 4,015.13

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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.