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Finding the Fourth Proportional to 16,812.70, 25,231.20 and 9,409.30

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Solution

The fourth proportional to 16,812.70, 25,231.20 and 9,409.30 is: 14,120.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,812.70 : 25,231.20 = 9,409.30 : x
  2. Step 2: Convert to fraction form
    16,812.70/25,231.20 = 9,409.30/x
  3. Step 3: Cross multiply
    16,812.70x = 25,231.20 × 9,409.30
  4. Step 4: Simplify right side
    16,812.70x = 237,407,930.16
  5. Step 5: Solve for x
    x = 237,407,930.16/16,812.70
  6. Step 6: Final answer
    x = 14,120.75

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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.