Home / 21,555.25-29,745.86-11,995.79

Finding the Fourth Proportional to 21,555.25, 29,745.86 and 11,995.79

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Solution

The fourth proportional to 21,555.25, 29,745.86 and 11,995.79 is: 16,553.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,555.25 : 29,745.86 = 11,995.79 : x
  2. Step 2: Convert to fraction form
    21,555.25/29,745.86 = 11,995.79/x
  3. Step 3: Cross multiply
    21,555.25x = 29,745.86 × 11,995.79
  4. Step 4: Simplify right side
    21,555.25x = 356,824,881.22
  5. Step 5: Solve for x
    x = 356,824,881.22/21,555.25
  6. Step 6: Final answer
    x = 16,553.97

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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.