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Finding the Fourth Proportional to 8,860.60, 13,310.70 and 7,402.60

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Solution

The fourth proportional to 8,860.60, 13,310.70 and 7,402.60 is: 11,120.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,860.60 : 13,310.70 = 7,402.60 : x
  2. Step 2: Convert to fraction form
    8,860.60/13,310.70 = 7,402.60/x
  3. Step 3: Cross multiply
    8,860.60x = 13,310.70 × 7,402.60
  4. Step 4: Simplify right side
    8,860.60x = 98,533,787.82
  5. Step 5: Solve for x
    x = 98,533,787.82/8,860.60
  6. Step 6: Final answer
    x = 11,120.44

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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.