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Finding the Fourth Proportional to 18,768.59, 25,910.03 and 10,809.28

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Solution

The fourth proportional to 18,768.59, 25,910.03 and 10,809.28 is: 14,922.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,768.59 : 25,910.03 = 10,809.28 : x
  2. Step 2: Convert to fraction form
    18,768.59/25,910.03 = 10,809.28/x
  3. Step 3: Cross multiply
    18,768.59x = 25,910.03 × 10,809.28
  4. Step 4: Simplify right side
    18,768.59x = 280,068,731.33
  5. Step 5: Solve for x
    x = 280,068,731.33/18,768.59
  6. Step 6: Final answer
    x = 14,922.20

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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.