Home / 20,129.88-27,786.06-11,753.40

Finding the Fourth Proportional to 20,129.88, 27,786.06 and 11,753.40

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Solution

The fourth proportional to 20,129.88, 27,786.06 and 11,753.40 is: 16,223.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,129.88 : 27,786.06 = 11,753.40 : x
  2. Step 2: Convert to fraction form
    20,129.88/27,786.06 = 11,753.40/x
  3. Step 3: Cross multiply
    20,129.88x = 27,786.06 × 11,753.40
  4. Step 4: Simplify right side
    20,129.88x = 326,580,677.60
  5. Step 5: Solve for x
    x = 326,580,677.60/20,129.88
  6. Step 6: Final answer
    x = 16,223.68

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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.