Home / 21,580.79-29,789.84-16,866.59

Finding the Fourth Proportional to 21,580.79, 29,789.84 and 16,866.59

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Solution

The fourth proportional to 21,580.79, 29,789.84 and 16,866.59 is: 23,282.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,580.79 : 29,789.84 = 16,866.59 : x
  2. Step 2: Convert to fraction form
    21,580.79/29,789.84 = 16,866.59/x
  3. Step 3: Cross multiply
    21,580.79x = 29,789.84 × 16,866.59
  4. Step 4: Simplify right side
    21,580.79x = 502,452,910.66
  5. Step 5: Solve for x
    x = 502,452,910.66/21,580.79
  6. Step 6: Final answer
    x = 23,282.42

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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.