Home / 21,343.86-29,451.81-11,912.82

Finding the Fourth Proportional to 21,343.86, 29,451.81 and 11,912.82

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Solution

The fourth proportional to 21,343.86, 29,451.81 and 11,912.82 is: 16,438.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,343.86 : 29,451.81 = 11,912.82 : x
  2. Step 2: Convert to fraction form
    21,343.86/29,451.81 = 11,912.82/x
  3. Step 3: Cross multiply
    21,343.86x = 29,451.81 × 11,912.82
  4. Step 4: Simplify right side
    21,343.86x = 350,854,111.20
  5. Step 5: Solve for x
    x = 350,854,111.20/21,343.86
  6. Step 6: Final answer
    x = 16,438.18

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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.