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Finding the Fourth Proportional to 18,056.72, 24,917.81 and 9,990.17

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Solution

The fourth proportional to 18,056.72, 24,917.81 and 9,990.17 is: 13,786.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,056.72 : 24,917.81 = 9,990.17 : x
  2. Step 2: Convert to fraction form
    18,056.72/24,917.81 = 9,990.17/x
  3. Step 3: Cross multiply
    18,056.72x = 24,917.81 × 9,990.17
  4. Step 4: Simplify right side
    18,056.72x = 248,933,157.93
  5. Step 5: Solve for x
    x = 248,933,157.93/18,056.72
  6. Step 6: Final answer
    x = 13,786.18

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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.