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Finding the Fourth Proportional to 19,754.44, 29,639.66 and 8,655.28

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Solution

The fourth proportional to 19,754.44, 29,639.66 and 8,655.28 is: 12,986.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,754.44 : 29,639.66 = 8,655.28 : x
  2. Step 2: Convert to fraction form
    19,754.44/29,639.66 = 8,655.28/x
  3. Step 3: Cross multiply
    19,754.44x = 29,639.66 × 8,655.28
  4. Step 4: Simplify right side
    19,754.44x = 256,539,556.40
  5. Step 5: Solve for x
    x = 256,539,556.40/19,754.44
  6. Step 6: Final answer
    x = 12,986.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.