Home / 21,660.68-29,893.75-13,160.85

Finding the Fourth Proportional to 21,660.68, 29,893.75 and 13,160.85

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Solution

The fourth proportional to 21,660.68, 29,893.75 and 13,160.85 is: 18,163.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,660.68 : 29,893.75 = 13,160.85 : x
  2. Step 2: Convert to fraction form
    21,660.68/29,893.75 = 13,160.85/x
  3. Step 3: Cross multiply
    21,660.68x = 29,893.75 × 13,160.85
  4. Step 4: Simplify right side
    21,660.68x = 393,427,010.22
  5. Step 5: Solve for x
    x = 393,427,010.22/21,660.68
  6. Step 6: Final answer
    x = 18,163.19

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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.