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Finding the Fourth Proportional to 27,891.80, 38,458.22 and 18,945.08

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Solution

The fourth proportional to 27,891.80, 38,458.22 and 18,945.08 is: 26,122.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,891.80 : 38,458.22 = 18,945.08 : x
  2. Step 2: Convert to fraction form
    27,891.80/38,458.22 = 18,945.08/x
  3. Step 3: Cross multiply
    27,891.80x = 38,458.22 × 18,945.08
  4. Step 4: Simplify right side
    27,891.80x = 728,594,054.56
  5. Step 5: Solve for x
    x = 728,594,054.56/27,891.80
  6. Step 6: Final answer
    x = 26,122.16

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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.