Home / 21,725.69-29,981.45-11,789.69

Finding the Fourth Proportional to 21,725.69, 29,981.45 and 11,789.69

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Solution

The fourth proportional to 21,725.69, 29,981.45 and 11,789.69 is: 16,269.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,725.69 : 29,981.45 = 11,789.69 : x
  2. Step 2: Convert to fraction form
    21,725.69/29,981.45 = 11,789.69/x
  3. Step 3: Cross multiply
    21,725.69x = 29,981.45 × 11,789.69
  4. Step 4: Simplify right side
    21,725.69x = 353,472,001.25
  5. Step 5: Solve for x
    x = 353,472,001.25/21,725.69
  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.