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Finding the Fourth Proportional to 27,754.86, 38,305.44 and 15,657.80

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Solution

The fourth proportional to 27,754.86, 38,305.44 and 15,657.80 is: 21,609.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,754.86 : 38,305.44 = 15,657.80 : x
  2. Step 2: Convert to fraction form
    27,754.86/38,305.44 = 15,657.80/x
  3. Step 3: Cross multiply
    27,754.86x = 38,305.44 × 15,657.80
  4. Step 4: Simplify right side
    27,754.86x = 599,778,918.43
  5. Step 5: Solve for x
    x = 599,778,918.43/27,754.86
  6. Step 6: Final answer
    x = 21,609.87

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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.