Home / 13,187.82-18,199.62-7,219.92

Finding the Fourth Proportional to 13,187.82, 18,199.62 and 7,219.92

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Solution

The fourth proportional to 13,187.82, 18,199.62 and 7,219.92 is: 9,963.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,187.82 : 18,199.62 = 7,219.92 : x
  2. Step 2: Convert to fraction form
    13,187.82/18,199.62 = 7,219.92/x
  3. Step 3: Cross multiply
    13,187.82x = 18,199.62 × 7,219.92
  4. Step 4: Simplify right side
    13,187.82x = 131,399,800.43
  5. Step 5: Solve for x
    x = 131,399,800.43/13,187.82
  6. Step 6: Final answer
    x = 9,963.72

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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.