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Finding the Fourth Proportional to 9,399.76, 12,972.08 and 5,208

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Solution

The fourth proportional to 9,399.76, 12,972.08 and 5,208 is: 7,187.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,399.76 : 12,972.08 = 5,208 : x
  2. Step 2: Convert to fraction form
    9,399.76/12,972.08 = 5,208/x
  3. Step 3: Cross multiply
    9,399.76x = 12,972.08 × 5,208
  4. Step 4: Simplify right side
    9,399.76x = 67,558,592.64
  5. Step 5: Solve for x
    x = 67,558,592.64/9,399.76
  6. Step 6: Final answer
    x = 7,187.27

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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.