Home / 15,921.76-21,979.14-11,672.84

Finding the Fourth Proportional to 15,921.76, 21,979.14 and 11,672.84

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Solution

The fourth proportional to 15,921.76, 21,979.14 and 11,672.84 is: 16,113.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,921.76 : 21,979.14 = 11,672.84 : x
  2. Step 2: Convert to fraction form
    15,921.76/21,979.14 = 11,672.84/x
  3. Step 3: Cross multiply
    15,921.76x = 21,979.14 × 11,672.84
  4. Step 4: Simplify right side
    15,921.76x = 256,558,984.56
  5. Step 5: Solve for x
    x = 256,558,984.56/15,921.76
  6. Step 6: Final answer
    x = 16,113.73

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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.