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Finding the Fourth Proportional to 8,912.74, 13,393.32 and 4,755.64

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Solution

The fourth proportional to 8,912.74, 13,393.32 and 4,755.64 is: 7,146.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,912.74 : 13,393.32 = 4,755.64 : x
  2. Step 2: Convert to fraction form
    8,912.74/13,393.32 = 4,755.64/x
  3. Step 3: Cross multiply
    8,912.74x = 13,393.32 × 4,755.64
  4. Step 4: Simplify right side
    8,912.74x = 63,693,808.32
  5. Step 5: Solve for x
    x = 63,693,808.32/8,912.74
  6. Step 6: Final answer
    x = 7,146.38

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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.