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Finding the Fourth Proportional to 4,986.13, 7,479.20 and 3,421.39

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Solution

The fourth proportional to 4,986.13, 7,479.20 and 3,421.39 is: 5,132.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,986.13 : 7,479.20 = 3,421.39 : x
  2. Step 2: Convert to fraction form
    4,986.13/7,479.20 = 3,421.39/x
  3. Step 3: Cross multiply
    4,986.13x = 7,479.20 × 3,421.39
  4. Step 4: Simplify right side
    4,986.13x = 25,589,244.72
  5. Step 5: Solve for x
    x = 25,589,244.72/4,986.13
  6. Step 6: Final answer
    x = 5,132.09

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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.