Home / 12,222.99-18,278.44-9,105.15

Finding the Fourth Proportional to 12,222.99, 18,278.44 and 9,105.15

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Solution

The fourth proportional to 12,222.99, 18,278.44 and 9,105.15 is: 13,615.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,222.99 : 18,278.44 = 9,105.15 : x
  2. Step 2: Convert to fraction form
    12,222.99/18,278.44 = 9,105.15/x
  3. Step 3: Cross multiply
    12,222.99x = 18,278.44 × 9,105.15
  4. Step 4: Simplify right side
    12,222.99x = 166,427,937.97
  5. Step 5: Solve for x
    x = 166,427,937.97/12,222.99
  6. Step 6: Final answer
    x = 13,615.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.