Home / 5,147.71-7,103.76-2,909.51

Finding the Fourth Proportional to 5,147.71, 7,103.76 and 2,909.51

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Solution

The fourth proportional to 5,147.71, 7,103.76 and 2,909.51 is: 4,015.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,147.71 : 7,103.76 = 2,909.51 : x
  2. Step 2: Convert to fraction form
    5,147.71/7,103.76 = 2,909.51/x
  3. Step 3: Cross multiply
    5,147.71x = 7,103.76 × 2,909.51
  4. Step 4: Simplify right side
    5,147.71x = 20,668,451.44
  5. Step 5: Solve for x
    x = 20,668,451.44/5,147.71
  6. Step 6: Final answer
    x = 4,015.08

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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.