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Finding the Fourth Proportional to 9,157.80, 13,739.16 and 3,893.06

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Solution

The fourth proportional to 9,157.80, 13,739.16 and 3,893.06 is: 5,840.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,157.80 : 13,739.16 = 3,893.06 : x
  2. Step 2: Convert to fraction form
    9,157.80/13,739.16 = 3,893.06/x
  3. Step 3: Cross multiply
    9,157.80x = 13,739.16 × 3,893.06
  4. Step 4: Simplify right side
    9,157.80x = 53,487,305.53
  5. Step 5: Solve for x
    x = 53,487,305.53/9,157.80
  6. Step 6: Final answer
    x = 5,840.63

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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.