Home / 21,039.09-29,035.19-12,086.36

Finding the Fourth Proportional to 21,039.09, 29,035.19 and 12,086.36

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Solution

The fourth proportional to 21,039.09, 29,035.19 and 12,086.36 is: 16,679.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,039.09 : 29,035.19 = 12,086.36 : x
  2. Step 2: Convert to fraction form
    21,039.09/29,035.19 = 12,086.36/x
  3. Step 3: Cross multiply
    21,039.09x = 29,035.19 × 12,086.36
  4. Step 4: Simplify right side
    21,039.09x = 350,929,759.01
  5. Step 5: Solve for x
    x = 350,929,759.01/21,039.09
  6. Step 6: Final answer
    x = 16,679.89

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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.