Home / 21,587.73-29,791.49-13,087.77

Finding the Fourth Proportional to 21,587.73, 29,791.49 and 13,087.77

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Solution

The fourth proportional to 21,587.73, 29,791.49 and 13,087.77 is: 18,061.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,587.73 : 29,791.49 = 13,087.77 : x
  2. Step 2: Convert to fraction form
    21,587.73/29,791.49 = 13,087.77/x
  3. Step 3: Cross multiply
    21,587.73x = 29,791.49 × 13,087.77
  4. Step 4: Simplify right side
    21,587.73x = 389,904,169.08
  5. Step 5: Solve for x
    x = 389,904,169.08/21,587.73
  6. Step 6: Final answer
    x = 18,061.38

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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.