Home / 21,790.78-32,690.01-11,257.87

Finding the Fourth Proportional to 21,790.78, 32,690.01 and 11,257.87

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Solution

The fourth proportional to 21,790.78, 32,690.01 and 11,257.87 is: 16,888.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,790.78 : 32,690.01 = 11,257.87 : x
  2. Step 2: Convert to fraction form
    21,790.78/32,690.01 = 11,257.87/x
  3. Step 3: Cross multiply
    21,790.78x = 32,690.01 × 11,257.87
  4. Step 4: Simplify right side
    21,790.78x = 368,019,811.96
  5. Step 5: Solve for x
    x = 368,019,811.96/21,790.78
  6. Step 6: Final answer
    x = 16,888.79

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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.