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Finding the Fourth Proportional to 13,162.47, 18,163.89 and 7,193.99

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Solution

The fourth proportional to 13,162.47, 18,163.89 and 7,193.99 is: 9,927.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,162.47 : 18,163.89 = 7,193.99 : x
  2. Step 2: Convert to fraction form
    13,162.47/18,163.89 = 7,193.99/x
  3. Step 3: Cross multiply
    13,162.47x = 18,163.89 × 7,193.99
  4. Step 4: Simplify right side
    13,162.47x = 130,670,752.20
  5. Step 5: Solve for x
    x = 130,670,752.20/13,162.47
  6. Step 6: Final answer
    x = 9,927.53

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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.