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Finding the Fourth Proportional to 9,960.60, 14,938.64 and 2,939.12

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Solution

The fourth proportional to 9,960.60, 14,938.64 and 2,939.12 is: 4,408.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,960.60 : 14,938.64 = 2,939.12 : x
  2. Step 2: Convert to fraction form
    9,960.60/14,938.64 = 2,939.12/x
  3. Step 3: Cross multiply
    9,960.60x = 14,938.64 × 2,939.12
  4. Step 4: Simplify right side
    9,960.60x = 43,906,455.60
  5. Step 5: Solve for x
    x = 43,906,455.60/9,960.60
  6. Step 6: Final answer
    x = 4,408.01

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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.