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Finding the Fourth Proportional to 13,328.69, 19,978.68 and 6,755.39

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Solution

The fourth proportional to 13,328.69, 19,978.68 and 6,755.39 is: 10,125.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,328.69 : 19,978.68 = 6,755.39 : x
  2. Step 2: Convert to fraction form
    13,328.69/19,978.68 = 6,755.39/x
  3. Step 3: Cross multiply
    13,328.69x = 19,978.68 × 6,755.39
  4. Step 4: Simplify right side
    13,328.69x = 134,963,775.09
  5. Step 5: Solve for x
    x = 134,963,775.09/13,328.69
  6. Step 6: Final answer
    x = 10,125.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.