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Finding the Fourth Proportional to 13,193.88, 18,202.08 and 8,655.31

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Solution

The fourth proportional to 13,193.88, 18,202.08 and 8,655.31 is: 11,940.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,193.88 : 18,202.08 = 8,655.31 : x
  2. Step 2: Convert to fraction form
    13,193.88/18,202.08 = 8,655.31/x
  3. Step 3: Cross multiply
    13,193.88x = 18,202.08 × 8,655.31
  4. Step 4: Simplify right side
    13,193.88x = 157,544,645.04
  5. Step 5: Solve for x
    x = 157,544,645.04/13,193.88
  6. Step 6: Final answer
    x = 11,940.74

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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.