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Finding the Fourth Proportional to 13,190.99, 18,202.73 and 7,222.73

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Solution

The fourth proportional to 13,190.99, 18,202.73 and 7,222.73 is: 9,966.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,190.99 : 18,202.73 = 7,222.73 : x
  2. Step 2: Convert to fraction form
    13,190.99/18,202.73 = 7,222.73/x
  3. Step 3: Cross multiply
    13,190.99x = 18,202.73 × 7,222.73
  4. Step 4: Simplify right side
    13,190.99x = 131,473,276.93
  5. Step 5: Solve for x
    x = 131,473,276.93/13,190.99
  6. Step 6: Final answer
    x = 9,966.90

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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.