Home / 21,186.45-31,786.02-6,395.85

Finding the Fourth Proportional to 21,186.45, 31,786.02 and 6,395.85

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Solution

The fourth proportional to 21,186.45, 31,786.02 and 6,395.85 is: 9,595.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,186.45 : 31,786.02 = 6,395.85 : x
  2. Step 2: Convert to fraction form
    21,186.45/31,786.02 = 6,395.85/x
  3. Step 3: Cross multiply
    21,186.45x = 31,786.02 × 6,395.85
  4. Step 4: Simplify right side
    21,186.45x = 203,298,616.02
  5. Step 5: Solve for x
    x = 203,298,616.02/21,186.45
  6. Step 6: Final answer
    x = 9,595.69

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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.