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Finding the Fourth Proportional to 18,991.60, 26,208.41 and 10,377.90

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Solution

The fourth proportional to 18,991.60, 26,208.41 and 10,377.90 is: 14,321.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,991.60 : 26,208.41 = 10,377.90 : x
  2. Step 2: Convert to fraction form
    18,991.60/26,208.41 = 10,377.90/x
  3. Step 3: Cross multiply
    18,991.60x = 26,208.41 × 10,377.90
  4. Step 4: Simplify right side
    18,991.60x = 271,988,258.14
  5. Step 5: Solve for x
    x = 271,988,258.14/18,991.60
  6. Step 6: Final answer
    x = 14,321.50

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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.