Home / 20,615.17-28,449-11,183.80

Finding the Fourth Proportional to 20,615.17, 28,449 and 11,183.80

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Solution

The fourth proportional to 20,615.17, 28,449 and 11,183.80 is: 15,433.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,615.17 : 28,449 = 11,183.80 : x
  2. Step 2: Convert to fraction form
    20,615.17/28,449 = 11,183.80/x
  3. Step 3: Cross multiply
    20,615.17x = 28,449 × 11,183.80
  4. Step 4: Simplify right side
    20,615.17x = 318,167,783.96
  5. Step 5: Solve for x
    x = 318,167,783.96/20,615.17
  6. Step 6: Final answer
    x = 15,433.68

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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.