Home / 21,220.71-29,285.82-11,789.19

Finding the Fourth Proportional to 21,220.71, 29,285.82 and 11,789.19

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Solution

The fourth proportional to 21,220.71, 29,285.82 and 11,789.19 is: 16,269.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,220.71 : 29,285.82 = 11,789.19 : x
  2. Step 2: Convert to fraction form
    21,220.71/29,285.82 = 11,789.19/x
  3. Step 3: Cross multiply
    21,220.71x = 29,285.82 × 11,789.19
  4. Step 4: Simplify right side
    21,220.71x = 345,256,096.29
  5. Step 5: Solve for x
    x = 345,256,096.29/21,220.71
  6. Step 6: Final answer
    x = 16,269.77

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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.