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Finding the Fourth Proportional to 19,978.36, 27,570.04 and 11,026.41

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Solution

The fourth proportional to 19,978.36, 27,570.04 and 11,026.41 is: 15,216.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,978.36 : 27,570.04 = 11,026.41 : x
  2. Step 2: Convert to fraction form
    19,978.36/27,570.04 = 11,026.41/x
  3. Step 3: Cross multiply
    19,978.36x = 27,570.04 × 11,026.41
  4. Step 4: Simplify right side
    19,978.36x = 303,998,564.76
  5. Step 5: Solve for x
    x = 303,998,564.76/19,978.36
  6. Step 6: Final answer
    x = 15,216.39

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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.