Home / 13,199.73-18,215.64-7,231.77

Finding the Fourth Proportional to 13,199.73, 18,215.64 and 7,231.77

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Solution

The fourth proportional to 13,199.73, 18,215.64 and 7,231.77 is: 9,979.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,199.73 : 18,215.64 = 7,231.77 : x
  2. Step 2: Convert to fraction form
    13,199.73/18,215.64 = 7,231.77/x
  3. Step 3: Cross multiply
    13,199.73x = 18,215.64 × 7,231.77
  4. Step 4: Simplify right side
    13,199.73x = 131,731,318.88
  5. Step 5: Solve for x
    x = 131,731,318.88/13,199.73
  6. Step 6: Final answer
    x = 9,979.85

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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.