Home / 13,190.28-18,202.62-7,221.99

Finding the Fourth Proportional to 13,190.28, 18,202.62 and 7,221.99

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Solution

The fourth proportional to 13,190.28, 18,202.62 and 7,221.99 is: 9,966.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,190.28 : 18,202.62 = 7,221.99 : x
  2. Step 2: Convert to fraction form
    13,190.28/18,202.62 = 7,221.99/x
  3. Step 3: Cross multiply
    13,190.28x = 18,202.62 × 7,221.99
  4. Step 4: Simplify right side
    13,190.28x = 131,459,139.61
  5. Step 5: Solve for x
    x = 131,459,139.61/13,190.28
  6. Step 6: Final answer
    x = 9,966.36

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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.