Home / 12,811.35-17,672.40-8,087.43

Finding the Fourth Proportional to 12,811.35, 17,672.40 and 8,087.43

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Solution

The fourth proportional to 12,811.35, 17,672.40 and 8,087.43 is: 11,156.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,811.35 : 17,672.40 = 8,087.43 : x
  2. Step 2: Convert to fraction form
    12,811.35/17,672.40 = 8,087.43/x
  3. Step 3: Cross multiply
    12,811.35x = 17,672.40 × 8,087.43
  4. Step 4: Simplify right side
    12,811.35x = 142,924,297.93
  5. Step 5: Solve for x
    x = 142,924,297.93/12,811.35
  6. Step 6: Final answer
    x = 11,156.07

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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.