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Finding the Fourth Proportional to 16,680.51, 25,020.74 and 7,910.64

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Solution

The fourth proportional to 16,680.51, 25,020.74 and 7,910.64 is: 11,865.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,680.51 : 25,020.74 = 7,910.64 : x
  2. Step 2: Convert to fraction form
    16,680.51/25,020.74 = 7,910.64/x
  3. Step 3: Cross multiply
    16,680.51x = 25,020.74 × 7,910.64
  4. Step 4: Simplify right side
    16,680.51x = 197,930,066.67
  5. Step 5: Solve for x
    x = 197,930,066.67/16,680.51
  6. Step 6: Final answer
    x = 11,865.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.