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Finding the Fourth Proportional to 9,418.90, 14,128.90 and 2,845.76

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Solution

The fourth proportional to 9,418.90, 14,128.90 and 2,845.76 is: 4,268.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,418.90 : 14,128.90 = 2,845.76 : x
  2. Step 2: Convert to fraction form
    9,418.90/14,128.90 = 2,845.76/x
  3. Step 3: Cross multiply
    9,418.90x = 14,128.90 × 2,845.76
  4. Step 4: Simplify right side
    9,418.90x = 40,207,458.46
  5. Step 5: Solve for x
    x = 40,207,458.46/9,418.90
  6. Step 6: Final answer
    x = 4,268.81

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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.