Home / 13,311.75-18,364.20-7,645.09

Finding the Fourth Proportional to 13,311.75, 18,364.20 and 7,645.09

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Solution

The fourth proportional to 13,311.75, 18,364.20 and 7,645.09 is: 10,546.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,311.75 : 18,364.20 = 7,645.09 : x
  2. Step 2: Convert to fraction form
    13,311.75/18,364.20 = 7,645.09/x
  3. Step 3: Cross multiply
    13,311.75x = 18,364.20 × 7,645.09
  4. Step 4: Simplify right side
    13,311.75x = 140,395,961.78
  5. Step 5: Solve for x
    x = 140,395,961.78/13,311.75
  6. Step 6: Final answer
    x = 10,546.77

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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.