Home / 13,211.21-18,231.46-7,242.75

Finding the Fourth Proportional to 13,211.21, 18,231.46 and 7,242.75

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Solution

The fourth proportional to 13,211.21, 18,231.46 and 7,242.75 is: 9,994.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,211.21 : 18,231.46 = 7,242.75 : x
  2. Step 2: Convert to fraction form
    13,211.21/18,231.46 = 7,242.75/x
  3. Step 3: Cross multiply
    13,211.21x = 18,231.46 × 7,242.75
  4. Step 4: Simplify right side
    13,211.21x = 132,045,906.92
  5. Step 5: Solve for x
    x = 132,045,906.92/13,211.21
  6. Step 6: Final answer
    x = 9,994.99

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Half scale
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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.