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Finding the Fourth Proportional to 18,620.97, 27,931.46 and 5,473.35

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Solution

The fourth proportional to 18,620.97, 27,931.46 and 5,473.35 is: 8,210.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,620.97 : 27,931.46 = 5,473.35 : x
  2. Step 2: Convert to fraction form
    18,620.97/27,931.46 = 5,473.35/x
  3. Step 3: Cross multiply
    18,620.97x = 27,931.46 × 5,473.35
  4. Step 4: Simplify right side
    18,620.97x = 152,878,629.22
  5. Step 5: Solve for x
    x = 152,878,629.22/18,620.97
  6. Step 6: Final answer
    x = 8,210.03

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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.