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Finding the Fourth Proportional to 13,163.31, 18,165.06 and 7,194.99

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Solution

The fourth proportional to 13,163.31, 18,165.06 and 7,194.99 is: 9,928.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,163.31 : 18,165.06 = 7,194.99 : x
  2. Step 2: Convert to fraction form
    13,163.31/18,165.06 = 7,194.99/x
  3. Step 3: Cross multiply
    13,163.31x = 18,165.06 × 7,194.99
  4. Step 4: Simplify right side
    13,163.31x = 130,697,425.05
  5. Step 5: Solve for x
    x = 130,697,425.05/13,163.31
  6. Step 6: Final answer
    x = 9,928.92

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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.