Home / 13,451.28-18,563.37-11,209.40

Finding the Fourth Proportional to 13,451.28, 18,563.37 and 11,209.40

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Solution

The fourth proportional to 13,451.28, 18,563.37 and 11,209.40 is: 15,469.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,451.28 : 18,563.37 = 11,209.40 : x
  2. Step 2: Convert to fraction form
    13,451.28/18,563.37 = 11,209.40/x
  3. Step 3: Cross multiply
    13,451.28x = 18,563.37 × 11,209.40
  4. Step 4: Simplify right side
    13,451.28x = 208,084,174.44
  5. Step 5: Solve for x
    x = 208,084,174.44/13,451.28
  6. Step 6: Final answer
    x = 15,469.47

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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.