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Finding the Fourth Proportional to 8,991.78, 13,487.80 and 3,445.41

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Solution

The fourth proportional to 8,991.78, 13,487.80 and 3,445.41 is: 5,168.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,991.78 : 13,487.80 = 3,445.41 : x
  2. Step 2: Convert to fraction form
    8,991.78/13,487.80 = 3,445.41/x
  3. Step 3: Cross multiply
    8,991.78x = 13,487.80 × 3,445.41
  4. Step 4: Simplify right side
    8,991.78x = 46,470,924.95
  5. Step 5: Solve for x
    x = 46,470,924.95/8,991.78
  6. Step 6: Final answer
    x = 5,168.16

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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.