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Finding the Fourth Proportional to 9,486, 13,091.04 and 5,760

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Solution

The fourth proportional to 9,486, 13,091.04 and 5,760 is: 7,949.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,486 : 13,091.04 = 5,760 : x
  2. Step 2: Convert to fraction form
    9,486/13,091.04 = 5,760/x
  3. Step 3: Cross multiply
    9,486x = 13,091.04 × 5,760
  4. Step 4: Simplify right side
    9,486x = 75,404,390.40
  5. Step 5: Solve for x
    x = 75,404,390.40/9,486
  6. Step 6: Final answer
    x = 7,949.02

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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.