Home / 21,379.62-29,512.11-19,137.54

Finding the Fourth Proportional to 21,379.62, 29,512.11 and 19,137.54

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Solution

The fourth proportional to 21,379.62, 29,512.11 and 19,137.54 is: 26,417.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,379.62 : 29,512.11 = 19,137.54 : x
  2. Step 2: Convert to fraction form
    21,379.62/29,512.11 = 19,137.54/x
  3. Step 3: Cross multiply
    21,379.62x = 29,512.11 × 19,137.54
  4. Step 4: Simplify right side
    21,379.62x = 564,789,185.61
  5. Step 5: Solve for x
    x = 564,789,185.61/21,379.62
  6. Step 6: Final answer
    x = 26,417.18

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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.