Home / 13,186.86-18,197.87-7,218.56

Finding the Fourth Proportional to 13,186.86, 18,197.87 and 7,218.56

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Solution

The fourth proportional to 13,186.86, 18,197.87 and 7,218.56 is: 9,961.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,186.86 : 18,197.87 = 7,218.56 : x
  2. Step 2: Convert to fraction form
    13,186.86/18,197.87 = 7,218.56/x
  3. Step 3: Cross multiply
    13,186.86x = 18,197.87 × 7,218.56
  4. Step 4: Simplify right side
    13,186.86x = 131,362,480.01
  5. Step 5: Solve for x
    x = 131,362,480.01/13,186.86
  6. Step 6: Final answer
    x = 9,961.62

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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.