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Finding the Fourth Proportional to 18,994.92, 28,422.48 and 11,471.64

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Solution

The fourth proportional to 18,994.92, 28,422.48 and 11,471.64 is: 17,165.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,994.92 : 28,422.48 = 11,471.64 : x
  2. Step 2: Convert to fraction form
    18,994.92/28,422.48 = 11,471.64/x
  3. Step 3: Cross multiply
    18,994.92x = 28,422.48 × 11,471.64
  4. Step 4: Simplify right side
    18,994.92x = 326,052,458.47
  5. Step 5: Solve for x
    x = 326,052,458.47/18,994.92
  6. Step 6: Final answer
    x = 17,165.25

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1.5x scale

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.