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Finding the Fourth Proportional to 8,935.60, 13,393.80 and 3,386.80

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Solution

The fourth proportional to 8,935.60, 13,393.80 and 3,386.80 is: 5,076.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,935.60 : 13,393.80 = 3,386.80 : x
  2. Step 2: Convert to fraction form
    8,935.60/13,393.80 = 3,386.80/x
  3. Step 3: Cross multiply
    8,935.60x = 13,393.80 × 3,386.80
  4. Step 4: Simplify right side
    8,935.60x = 45,362,121.84
  5. Step 5: Solve for x
    x = 45,362,121.84/8,935.60
  6. Step 6: Final answer
    x = 5,076.56

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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.