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Finding the Fourth Proportional to 15,754.28, 21,738.93 and 9,039.02

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Solution

The fourth proportional to 15,754.28, 21,738.93 and 9,039.02 is: 12,472.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,754.28 : 21,738.93 = 9,039.02 : x
  2. Step 2: Convert to fraction form
    15,754.28/21,738.93 = 9,039.02/x
  3. Step 3: Cross multiply
    15,754.28x = 21,738.93 × 9,039.02
  4. Step 4: Simplify right side
    15,754.28x = 196,498,623.05
  5. Step 5: Solve for x
    x = 196,498,623.05/15,754.28
  6. Step 6: Final answer
    x = 12,472.71

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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.