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Finding the Fourth Proportional to 8,698, 12,003.24 and 4,921.09

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Solution

The fourth proportional to 8,698, 12,003.24 and 4,921.09 is: 6,791.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,698 : 12,003.24 = 4,921.09 : x
  2. Step 2: Convert to fraction form
    8,698/12,003.24 = 4,921.09/x
  3. Step 3: Cross multiply
    8,698x = 12,003.24 × 4,921.09
  4. Step 4: Simplify right side
    8,698x = 59,069,024.33
  5. Step 5: Solve for x
    x = 59,069,024.33/8,698
  6. Step 6: Final answer
    x = 6,791.10

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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.