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Finding the Fourth Proportional to 19,556, 26,987.32 and 11,172.48

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Solution

The fourth proportional to 19,556, 26,987.32 and 11,172.48 is: 15,418.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,556 : 26,987.32 = 11,172.48 : x
  2. Step 2: Convert to fraction form
    19,556/26,987.32 = 11,172.48/x
  3. Step 3: Cross multiply
    19,556x = 26,987.32 × 11,172.48
  4. Step 4: Simplify right side
    19,556x = 301,515,292.95
  5. Step 5: Solve for x
    x = 301,515,292.95/19,556
  6. Step 6: Final answer
    x = 15,418.05

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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.