Home / 21,305.30-29,454.45-15,990.89

Finding the Fourth Proportional to 21,305.30, 29,454.45 and 15,990.89

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Solution

The fourth proportional to 21,305.30, 29,454.45 and 15,990.89 is: 22,107.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,305.30 : 29,454.45 = 15,990.89 : x
  2. Step 2: Convert to fraction form
    21,305.30/29,454.45 = 15,990.89/x
  3. Step 3: Cross multiply
    21,305.30x = 29,454.45 × 15,990.89
  4. Step 4: Simplify right side
    21,305.30x = 471,002,662.72
  5. Step 5: Solve for x
    x = 471,002,662.72/21,305.30
  6. Step 6: Final answer
    x = 22,107.31

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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.