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Finding the Fourth Proportional to 7,216, 9,958.08 and 3,904

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Solution

The fourth proportional to 7,216, 9,958.08 and 3,904 is: 5,387.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,216 : 9,958.08 = 3,904 : x
  2. Step 2: Convert to fraction form
    7,216/9,958.08 = 3,904/x
  3. Step 3: Cross multiply
    7,216x = 9,958.08 × 3,904
  4. Step 4: Simplify right side
    7,216x = 38,876,344.32
  5. Step 5: Solve for x
    x = 38,876,344.32/7,216
  6. Step 6: Final answer
    x = 5,387.52

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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.