Home / 21,790.22-32,669.40-6,990.72

Finding the Fourth Proportional to 21,790.22, 32,669.40 and 6,990.72

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Solution

The fourth proportional to 21,790.22, 32,669.40 and 6,990.72 is: 10,480.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,790.22 : 32,669.40 = 6,990.72 : x
  2. Step 2: Convert to fraction form
    21,790.22/32,669.40 = 6,990.72/x
  3. Step 3: Cross multiply
    21,790.22x = 32,669.40 × 6,990.72
  4. Step 4: Simplify right side
    21,790.22x = 228,382,627.97
  5. Step 5: Solve for x
    x = 228,382,627.97/21,790.22
  6. Step 6: Final answer
    x = 10,480.97

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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.