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Finding the Fourth Proportional to 9,369.07, 12,929.29 and 5,390.97

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Solution

The fourth proportional to 9,369.07, 12,929.29 and 5,390.97 is: 7,439.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,369.07 : 12,929.29 = 5,390.97 : x
  2. Step 2: Convert to fraction form
    9,369.07/12,929.29 = 5,390.97/x
  3. Step 3: Cross multiply
    9,369.07x = 12,929.29 × 5,390.97
  4. Step 4: Simplify right side
    9,369.07x = 69,701,414.51
  5. Step 5: Solve for x
    x = 69,701,414.51/9,369.07
  6. Step 6: Final answer
    x = 7,439.52

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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.