Home / 13,190.40-18,211.23-11,771.64

Finding the Fourth Proportional to 13,190.40, 18,211.23 and 11,771.64

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Solution

The fourth proportional to 13,190.40, 18,211.23 and 11,771.64 is: 16,252.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,190.40 : 18,211.23 = 11,771.64 : x
  2. Step 2: Convert to fraction form
    13,190.40/18,211.23 = 11,771.64/x
  3. Step 3: Cross multiply
    13,190.40x = 18,211.23 × 11,771.64
  4. Step 4: Simplify right side
    13,190.40x = 214,376,043.52
  5. Step 5: Solve for x
    x = 214,376,043.52/13,190.40
  6. Step 6: Final answer
    x = 16,252.43

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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.