Home / 13,188.42-18,199.30-7,218.93

Finding the Fourth Proportional to 13,188.42, 18,199.30 and 7,218.93

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Solution

The fourth proportional to 13,188.42, 18,199.30 and 7,218.93 is: 9,961.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,188.42 : 18,199.30 = 7,218.93 : x
  2. Step 2: Convert to fraction form
    13,188.42/18,199.30 = 7,218.93/x
  3. Step 3: Cross multiply
    13,188.42x = 18,199.30 × 7,218.93
  4. Step 4: Simplify right side
    13,188.42x = 131,379,472.75
  5. Step 5: Solve for x
    x = 131,379,472.75/13,188.42
  6. Step 6: Final answer
    x = 9,961.73

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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.