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Finding the Fourth Proportional to 7,851, 11,776.52 and 2,379

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Solution

The fourth proportional to 7,851, 11,776.52 and 2,379 is: 3,568.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,851 : 11,776.52 = 2,379 : x
  2. Step 2: Convert to fraction form
    7,851/11,776.52 = 2,379/x
  3. Step 3: Cross multiply
    7,851x = 11,776.52 × 2,379
  4. Step 4: Simplify right side
    7,851x = 28,016,341.08
  5. Step 5: Solve for x
    x = 28,016,341.08/7,851
  6. Step 6: Final answer
    x = 3,568.51

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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.