Home / 21,220.56-29,283.96-11,789.04

Finding the Fourth Proportional to 21,220.56, 29,283.96 and 11,789.04

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Solution

The fourth proportional to 21,220.56, 29,283.96 and 11,789.04 is: 16,268.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,220.56 : 29,283.96 = 11,789.04 : x
  2. Step 2: Convert to fraction form
    21,220.56/29,283.96 = 11,789.04/x
  3. Step 3: Cross multiply
    21,220.56x = 29,283.96 × 11,789.04
  4. Step 4: Simplify right side
    21,220.56x = 345,229,775.80
  5. Step 5: Solve for x
    x = 345,229,775.80/21,220.56
  6. Step 6: Final answer
    x = 16,268.65

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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.