Home / 21,836.22-30,134.79-12,406.38

Finding the Fourth Proportional to 21,836.22, 30,134.79 and 12,406.38

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Solution

The fourth proportional to 21,836.22, 30,134.79 and 12,406.38 is: 17,121.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,836.22 : 30,134.79 = 12,406.38 : x
  2. Step 2: Convert to fraction form
    21,836.22/30,134.79 = 12,406.38/x
  3. Step 3: Cross multiply
    21,836.22x = 30,134.79 × 12,406.38
  4. Step 4: Simplify right side
    21,836.22x = 373,863,655.96
  5. Step 5: Solve for x
    x = 373,863,655.96/21,836.22
  6. Step 6: Final answer
    x = 17,121.26

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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.