Home / 21,645.72-29,850.39-13,149.23

Finding the Fourth Proportional to 21,645.72, 29,850.39 and 13,149.23

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Solution

The fourth proportional to 21,645.72, 29,850.39 and 13,149.23 is: 18,133.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,645.72 : 29,850.39 = 13,149.23 : x
  2. Step 2: Convert to fraction form
    21,645.72/29,850.39 = 13,149.23/x
  3. Step 3: Cross multiply
    21,645.72x = 29,850.39 × 13,149.23
  4. Step 4: Simplify right side
    21,645.72x = 392,509,494.45
  5. Step 5: Solve for x
    x = 392,509,494.45/21,645.72
  6. Step 6: Final answer
    x = 18,133.35

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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.