Home / 13,739.71-20,613.43-3,879.07

Finding the Fourth Proportional to 13,739.71, 20,613.43 and 3,879.07

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Solution

The fourth proportional to 13,739.71, 20,613.43 and 3,879.07 is: 5,819.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,739.71 : 20,613.43 = 3,879.07 : x
  2. Step 2: Convert to fraction form
    13,739.71/20,613.43 = 3,879.07/x
  3. Step 3: Cross multiply
    13,739.71x = 20,613.43 × 3,879.07
  4. Step 4: Simplify right side
    13,739.71x = 79,960,937.91
  5. Step 5: Solve for x
    x = 79,960,937.91/13,739.71
  6. Step 6: Final answer
    x = 5,819.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.