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Finding the Fourth Proportional to 19,893.92, 27,424.70 and 13,907.03

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Solution

The fourth proportional to 19,893.92, 27,424.70 and 13,907.03 is: 19,171.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,893.92 : 27,424.70 = 13,907.03 : x
  2. Step 2: Convert to fraction form
    19,893.92/27,424.70 = 13,907.03/x
  3. Step 3: Cross multiply
    19,893.92x = 27,424.70 × 13,907.03
  4. Step 4: Simplify right side
    19,893.92x = 381,395,918.98
  5. Step 5: Solve for x
    x = 381,395,918.98/19,893.92
  6. Step 6: Final answer
    x = 19,171.49

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1.5x scale

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.