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Finding the Fourth Proportional to 8,328.40, 12,494.40 and 2,485.60

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Solution

The fourth proportional to 8,328.40, 12,494.40 and 2,485.60 is: 3,728.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,328.40 : 12,494.40 = 2,485.60 : x
  2. Step 2: Convert to fraction form
    8,328.40/12,494.40 = 2,485.60/x
  3. Step 3: Cross multiply
    8,328.40x = 12,494.40 × 2,485.60
  4. Step 4: Simplify right side
    8,328.40x = 31,056,080.64
  5. Step 5: Solve for x
    x = 31,056,080.64/8,328.40
  6. Step 6: Final answer
    x = 3,728.94

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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.