Home / 20,111.13-30,185.30-10,257.75

Finding the Fourth Proportional to 20,111.13, 30,185.30 and 10,257.75

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Solution

The fourth proportional to 20,111.13, 30,185.30 and 10,257.75 is: 15,396.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,111.13 : 30,185.30 = 10,257.75 : x
  2. Step 2: Convert to fraction form
    20,111.13/30,185.30 = 10,257.75/x
  3. Step 3: Cross multiply
    20,111.13x = 30,185.30 × 10,257.75
  4. Step 4: Simplify right side
    20,111.13x = 309,633,261.08
  5. Step 5: Solve for x
    x = 309,633,261.08/20,111.13
  6. Step 6: Final answer
    x = 15,396.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.