Home / 13,811.92-20,720.58-5,490.38

Finding the Fourth Proportional to 13,811.92, 20,720.58 and 5,490.38

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Solution

The fourth proportional to 13,811.92, 20,720.58 and 5,490.38 is: 8,236.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,811.92 : 20,720.58 = 5,490.38 : x
  2. Step 2: Convert to fraction form
    13,811.92/20,720.58 = 5,490.38/x
  3. Step 3: Cross multiply
    13,811.92x = 20,720.58 × 5,490.38
  4. Step 4: Simplify right side
    13,811.92x = 113,763,858.02
  5. Step 5: Solve for x
    x = 113,763,858.02/13,811.92
  6. Step 6: Final answer
    x = 8,236.64

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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.