Home / 21,220.48-29,284.44-11,789.20

Finding the Fourth Proportional to 21,220.48, 29,284.44 and 11,789.20

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Solution

The fourth proportional to 21,220.48, 29,284.44 and 11,789.20 is: 16,269.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,220.48 : 29,284.44 = 11,789.20 : x
  2. Step 2: Convert to fraction form
    21,220.48/29,284.44 = 11,789.20/x
  3. Step 3: Cross multiply
    21,220.48x = 29,284.44 × 11,789.20
  4. Step 4: Simplify right side
    21,220.48x = 345,240,120.05
  5. Step 5: Solve for x
    x = 345,240,120.05/21,220.48
  6. Step 6: Final answer
    x = 16,269.19

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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.