Home / 21,220-29,283.62-11,789.44

Finding the Fourth Proportional to 21,220, 29,283.62 and 11,789.44

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Solution

The fourth proportional to 21,220, 29,283.62 and 11,789.44 is: 16,269.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,220 : 29,283.62 = 11,789.44 : x
  2. Step 2: Convert to fraction form
    21,220/29,283.62 = 11,789.44/x
  3. Step 3: Cross multiply
    21,220x = 29,283.62 × 11,789.44
  4. Step 4: Simplify right side
    21,220x = 345,237,480.97
  5. Step 5: Solve for x
    x = 345,237,480.97/21,220
  6. Step 6: Final answer
    x = 16,269.44

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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.