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Finding the Fourth Proportional to 11,148.40, 16,722.60 and 2,940.40

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Solution

The fourth proportional to 11,148.40, 16,722.60 and 2,940.40 is: 4,410.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,148.40 : 16,722.60 = 2,940.40 : x
  2. Step 2: Convert to fraction form
    11,148.40/16,722.60 = 2,940.40/x
  3. Step 3: Cross multiply
    11,148.40x = 16,722.60 × 2,940.40
  4. Step 4: Simplify right side
    11,148.40x = 49,171,133.04
  5. Step 5: Solve for x
    x = 49,171,133.04/11,148.40
  6. Step 6: Final answer
    x = 4,410.60

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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.