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Finding the Fourth Proportional to 18,118.46, 24,994.94 and 12,816.20

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Solution

The fourth proportional to 18,118.46, 24,994.94 and 12,816.20 is: 17,680.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,118.46 : 24,994.94 = 12,816.20 : x
  2. Step 2: Convert to fraction form
    18,118.46/24,994.94 = 12,816.20/x
  3. Step 3: Cross multiply
    18,118.46x = 24,994.94 × 12,816.20
  4. Step 4: Simplify right side
    18,118.46x = 320,340,150.03
  5. Step 5: Solve for x
    x = 320,340,150.03/18,118.46
  6. Step 6: Final answer
    x = 17,680.32

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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.