Home / 21,902.87-32,790.99-12,869.66

Finding the Fourth Proportional to 21,902.87, 32,790.99 and 12,869.66

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Solution

The fourth proportional to 21,902.87, 32,790.99 and 12,869.66 is: 19,267.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,902.87 : 32,790.99 = 12,869.66 : x
  2. Step 2: Convert to fraction form
    21,902.87/32,790.99 = 12,869.66/x
  3. Step 3: Cross multiply
    21,902.87x = 32,790.99 × 12,869.66
  4. Step 4: Simplify right side
    21,902.87x = 422,009,022.60
  5. Step 5: Solve for x
    x = 422,009,022.60/21,902.87
  6. Step 6: Final answer
    x = 19,267.29

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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.