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Finding the Fourth Proportional to 18,114.47, 24,989.46 and 12,812.21

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Solution

The fourth proportional to 18,114.47, 24,989.46 and 12,812.21 is: 17,674.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,114.47 : 24,989.46 = 12,812.21 : x
  2. Step 2: Convert to fraction form
    18,114.47/24,989.46 = 12,812.21/x
  3. Step 3: Cross multiply
    18,114.47x = 24,989.46 × 12,812.21
  4. Step 4: Simplify right side
    18,114.47x = 320,170,202.09
  5. Step 5: Solve for x
    x = 320,170,202.09/18,114.47
  6. Step 6: Final answer
    x = 17,674.83

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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.