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Finding the Fourth Proportional to 19,900.85, 29,852.19 and 18,943.28

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Solution

The fourth proportional to 19,900.85, 29,852.19 and 18,943.28 is: 28,415.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,900.85 : 29,852.19 = 18,943.28 : x
  2. Step 2: Convert to fraction form
    19,900.85/29,852.19 = 18,943.28/x
  3. Step 3: Cross multiply
    19,900.85x = 29,852.19 × 18,943.28
  4. Step 4: Simplify right side
    19,900.85x = 565,498,393.78
  5. Step 5: Solve for x
    x = 565,498,393.78/19,900.85
  6. Step 6: Final answer
    x = 28,415.79

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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.