Home / 21,108.30-29,185.11-18,483.90

Finding the Fourth Proportional to 21,108.30, 29,185.11 and 18,483.90

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Solution

The fourth proportional to 21,108.30, 29,185.11 and 18,483.90 is: 25,556.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,108.30 : 29,185.11 = 18,483.90 : x
  2. Step 2: Convert to fraction form
    21,108.30/29,185.11 = 18,483.90/x
  3. Step 3: Cross multiply
    21,108.30x = 29,185.11 × 18,483.90
  4. Step 4: Simplify right side
    21,108.30x = 539,454,654.73
  5. Step 5: Solve for x
    x = 539,454,654.73/21,108.30
  6. Step 6: Final answer
    x = 25,556.52

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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.