Home / 21,221.12-29,287.37-11,789.69

Finding the Fourth Proportional to 21,221.12, 29,287.37 and 11,789.69

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Solution

The fourth proportional to 21,221.12, 29,287.37 and 11,789.69 is: 16,271.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,221.12 : 29,287.37 = 11,789.69 : x
  2. Step 2: Convert to fraction form
    21,221.12/29,287.37 = 11,789.69/x
  3. Step 3: Cross multiply
    21,221.12x = 29,287.37 × 11,789.69
  4. Step 4: Simplify right side
    21,221.12x = 345,288,896.25
  5. Step 5: Solve for x
    x = 345,288,896.25/21,221.12
  6. Step 6: Final answer
    x = 16,271.00

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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.