Home / 13,321.88-18,383.20-7,656.64

Finding the Fourth Proportional to 13,321.88, 18,383.20 and 7,656.64

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Solution

The fourth proportional to 13,321.88, 18,383.20 and 7,656.64 is: 10,565.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,321.88 : 18,383.20 = 7,656.64 : x
  2. Step 2: Convert to fraction form
    13,321.88/18,383.20 = 7,656.64/x
  3. Step 3: Cross multiply
    13,321.88x = 18,383.20 × 7,656.64
  4. Step 4: Simplify right side
    13,321.88x = 140,753,544.45
  5. Step 5: Solve for x
    x = 140,753,544.45/13,321.88
  6. Step 6: Final answer
    x = 10,565.59

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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.