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Finding the Fourth Proportional to 8,420.08, 11,620.04 and 4,694

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Solution

The fourth proportional to 8,420.08, 11,620.04 and 4,694 is: 6,477.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.08 : 11,620.04 = 4,694 : x
  2. Step 2: Convert to fraction form
    8,420.08/11,620.04 = 4,694/x
  3. Step 3: Cross multiply
    8,420.08x = 11,620.04 × 4,694
  4. Step 4: Simplify right side
    8,420.08x = 54,544,467.76
  5. Step 5: Solve for x
    x = 54,544,467.76/8,420.08
  6. Step 6: Final answer
    x = 6,477.90

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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.