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Finding the Fourth Proportional to 28,163.66, 38,844.15 and 19,662.98

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Solution

The fourth proportional to 28,163.66, 38,844.15 and 19,662.98 is: 27,119.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,163.66 : 38,844.15 = 19,662.98 : x
  2. Step 2: Convert to fraction form
    28,163.66/38,844.15 = 19,662.98/x
  3. Step 3: Cross multiply
    28,163.66x = 38,844.15 × 19,662.98
  4. Step 4: Simplify right side
    28,163.66x = 763,791,744.57
  5. Step 5: Solve for x
    x = 763,791,744.57/28,163.66
  6. Step 6: Final answer
    x = 27,119.76

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1.5x scale

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.