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Finding the Fourth Proportional to 8,608.48, 12,909.12 and 3,988

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Solution

The fourth proportional to 8,608.48, 12,909.12 and 3,988 is: 5,980.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,608.48 : 12,909.12 = 3,988 : x
  2. Step 2: Convert to fraction form
    8,608.48/12,909.12 = 3,988/x
  3. Step 3: Cross multiply
    8,608.48x = 12,909.12 × 3,988
  4. Step 4: Simplify right side
    8,608.48x = 51,481,570.56
  5. Step 5: Solve for x
    x = 51,481,570.56/8,608.48
  6. Step 6: Final answer
    x = 5,980.33

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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.