Home / 20,786.88-31,181.40-10,395.12

Finding the Fourth Proportional to 20,786.88, 31,181.40 and 10,395.12

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Solution

The fourth proportional to 20,786.88, 31,181.40 and 10,395.12 is: 15,593.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,786.88 : 31,181.40 = 10,395.12 : x
  2. Step 2: Convert to fraction form
    20,786.88/31,181.40 = 10,395.12/x
  3. Step 3: Cross multiply
    20,786.88x = 31,181.40 × 10,395.12
  4. Step 4: Simplify right side
    20,786.88x = 324,134,394.77
  5. Step 5: Solve for x
    x = 324,134,394.77/20,786.88
  6. Step 6: Final answer
    x = 15,593.22

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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.