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Finding the Fourth Proportional to 7,812, 11,719.82 and 2,265.46

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Solution

The fourth proportional to 7,812, 11,719.82 and 2,265.46 is: 3,398.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,812 : 11,719.82 = 2,265.46 : x
  2. Step 2: Convert to fraction form
    7,812/11,719.82 = 2,265.46/x
  3. Step 3: Cross multiply
    7,812x = 11,719.82 × 2,265.46
  4. Step 4: Simplify right side
    7,812x = 26,550,783.42
  5. Step 5: Solve for x
    x = 26,550,783.42/7,812
  6. Step 6: Final answer
    x = 3,398.72

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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.