Home / 21,147.80-29,170.76-13,603.97

Finding the Fourth Proportional to 21,147.80, 29,170.76 and 13,603.97

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Solution

The fourth proportional to 21,147.80, 29,170.76 and 13,603.97 is: 18,764.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,147.80 : 29,170.76 = 13,603.97 : x
  2. Step 2: Convert to fraction form
    21,147.80/29,170.76 = 13,603.97/x
  3. Step 3: Cross multiply
    21,147.80x = 29,170.76 × 13,603.97
  4. Step 4: Simplify right side
    21,147.80x = 396,837,930.04
  5. Step 5: Solve for x
    x = 396,837,930.04/21,147.80
  6. Step 6: Final answer
    x = 18,764.98

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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.