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Finding the Fourth Proportional to 8,918.60, 12,308.33 and 4,940.08

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Solution

The fourth proportional to 8,918.60, 12,308.33 and 4,940.08 is: 6,817.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,918.60 : 12,308.33 = 4,940.08 : x
  2. Step 2: Convert to fraction form
    8,918.60/12,308.33 = 4,940.08/x
  3. Step 3: Cross multiply
    8,918.60x = 12,308.33 × 4,940.08
  4. Step 4: Simplify right side
    8,918.60x = 60,804,116.45
  5. Step 5: Solve for x
    x = 60,804,116.45/8,918.60
  6. Step 6: Final answer
    x = 6,817.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.