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Finding the Fourth Proportional to 9,630.88, 13,290.62 and 5,439.40

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Solution

The fourth proportional to 9,630.88, 13,290.62 and 5,439.40 is: 7,506.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,630.88 : 13,290.62 = 5,439.40 : x
  2. Step 2: Convert to fraction form
    9,630.88/13,290.62 = 5,439.40/x
  3. Step 3: Cross multiply
    9,630.88x = 13,290.62 × 5,439.40
  4. Step 4: Simplify right side
    9,630.88x = 72,292,998.43
  5. Step 5: Solve for x
    x = 72,292,998.43/9,630.88
  6. Step 6: Final answer
    x = 7,506.38

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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.