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Finding the Fourth Proportional to 19,556.64, 26,978.21 and 12,374.47

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Solution

The fourth proportional to 19,556.64, 26,978.21 and 12,374.47 is: 17,070.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,556.64 : 26,978.21 = 12,374.47 : x
  2. Step 2: Convert to fraction form
    19,556.64/26,978.21 = 12,374.47/x
  3. Step 3: Cross multiply
    19,556.64x = 26,978.21 × 12,374.47
  4. Step 4: Simplify right side
    19,556.64x = 333,841,138.16
  5. Step 5: Solve for x
    x = 333,841,138.16/19,556.64
  6. Step 6: Final answer
    x = 17,070.48

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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.