Home / 21,305.80-32,016.30-18,771.40

Finding the Fourth Proportional to 21,305.80, 32,016.30 and 18,771.40

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Solution

The fourth proportional to 21,305.80, 32,016.30 and 18,771.40 is: 28,207.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,305.80 : 32,016.30 = 18,771.40 : x
  2. Step 2: Convert to fraction form
    21,305.80/32,016.30 = 18,771.40/x
  3. Step 3: Cross multiply
    21,305.80x = 32,016.30 × 18,771.40
  4. Step 4: Simplify right side
    21,305.80x = 600,990,773.82
  5. Step 5: Solve for x
    x = 600,990,773.82/21,305.80
  6. Step 6: Final answer
    x = 28,207.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.