Home / 21,725.76-29,981.53-11,789.76

Finding the Fourth Proportional to 21,725.76, 29,981.53 and 11,789.76

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Solution

The fourth proportional to 21,725.76, 29,981.53 and 11,789.76 is: 16,269.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,725.76 : 29,981.53 = 11,789.76 : x
  2. Step 2: Convert to fraction form
    21,725.76/29,981.53 = 11,789.76/x
  3. Step 3: Cross multiply
    21,725.76x = 29,981.53 × 11,789.76
  4. Step 4: Simplify right side
    21,725.76x = 353,475,043.13
  5. Step 5: Solve for x
    x = 353,475,043.13/21,725.76
  6. Step 6: Final answer
    x = 16,269.86

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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.