Home / 11,318.28-16,977.55-3,420.86

Finding the Fourth Proportional to 11,318.28, 16,977.55 and 3,420.86

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Solution

The fourth proportional to 11,318.28, 16,977.55 and 3,420.86 is: 5,131.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,318.28 : 16,977.55 = 3,420.86 : x
  2. Step 2: Convert to fraction form
    11,318.28/16,977.55 = 3,420.86/x
  3. Step 3: Cross multiply
    11,318.28x = 16,977.55 × 3,420.86
  4. Step 4: Simplify right side
    11,318.28x = 58,077,821.69
  5. Step 5: Solve for x
    x = 58,077,821.69/11,318.28
  6. Step 6: Final answer
    x = 5,131.33

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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.