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Finding the Fourth Proportional to 19,345.96, 26,686.02 and 11,881

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Solution

The fourth proportional to 19,345.96, 26,686.02 and 11,881 is: 16,388.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,345.96 : 26,686.02 = 11,881 : x
  2. Step 2: Convert to fraction form
    19,345.96/26,686.02 = 11,881/x
  3. Step 3: Cross multiply
    19,345.96x = 26,686.02 × 11,881
  4. Step 4: Simplify right side
    19,345.96x = 317,056,603.62
  5. Step 5: Solve for x
    x = 317,056,603.62/19,345.96
  6. Step 6: Final answer
    x = 16,388.78

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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.