Home / 13,205.52-18,213.12-11,222.64

Finding the Fourth Proportional to 13,205.52, 18,213.12 and 11,222.64

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Solution

The fourth proportional to 13,205.52, 18,213.12 and 11,222.64 is: 15,478.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,205.52 : 18,213.12 = 11,222.64 : x
  2. Step 2: Convert to fraction form
    13,205.52/18,213.12 = 11,222.64/x
  3. Step 3: Cross multiply
    13,205.52x = 18,213.12 × 11,222.64
  4. Step 4: Simplify right side
    13,205.52x = 204,399,289.04
  5. Step 5: Solve for x
    x = 204,399,289.04/13,205.52
  6. Step 6: Final answer
    x = 15,478.32

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Half scale
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Double scale
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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.