Home / 13,449.21-18,556.89-8,143.92

Finding the Fourth Proportional to 13,449.21, 18,556.89 and 8,143.92

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Solution

The fourth proportional to 13,449.21, 18,556.89 and 8,143.92 is: 11,236.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,449.21 : 18,556.89 = 8,143.92 : x
  2. Step 2: Convert to fraction form
    13,449.21/18,556.89 = 8,143.92/x
  3. Step 3: Cross multiply
    13,449.21x = 18,556.89 × 8,143.92
  4. Step 4: Simplify right side
    13,449.21x = 151,125,827.61
  5. Step 5: Solve for x
    x = 151,125,827.61/13,449.21
  6. Step 6: Final answer
    x = 11,236.78

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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.