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Finding the Fourth Proportional to 8,605, 11,874.90 and 4,879

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Solution

The fourth proportional to 8,605, 11,874.90 and 4,879 is: 6,733.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,605 : 11,874.90 = 4,879 : x
  2. Step 2: Convert to fraction form
    8,605/11,874.90 = 4,879/x
  3. Step 3: Cross multiply
    8,605x = 11,874.90 × 4,879
  4. Step 4: Simplify right side
    8,605x = 57,937,637.10
  5. Step 5: Solve for x
    x = 57,937,637.10/8,605
  6. Step 6: Final answer
    x = 6,733.02

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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.