Home / 13,135.88-18,121.25-8,888.42

Finding the Fourth Proportional to 13,135.88, 18,121.25 and 8,888.42

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Solution

The fourth proportional to 13,135.88, 18,121.25 and 8,888.42 is: 12,261.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,135.88 : 18,121.25 = 8,888.42 : x
  2. Step 2: Convert to fraction form
    13,135.88/18,121.25 = 8,888.42/x
  3. Step 3: Cross multiply
    13,135.88x = 18,121.25 × 8,888.42
  4. Step 4: Simplify right side
    13,135.88x = 161,069,145.88
  5. Step 5: Solve for x
    x = 161,069,145.88/13,135.88
  6. Step 6: Final answer
    x = 12,261.78

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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.