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Finding the Fourth Proportional to 49,660.40, 74,490.60 and 12,724.40

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Solution

The fourth proportional to 49,660.40, 74,490.60 and 12,724.40 is: 19,086.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,660.40 : 74,490.60 = 12,724.40 : x
  2. Step 2: Convert to fraction form
    49,660.40/74,490.60 = 12,724.40/x
  3. Step 3: Cross multiply
    49,660.40x = 74,490.60 × 12,724.40
  4. Step 4: Simplify right side
    49,660.40x = 947,848,190.64
  5. Step 5: Solve for x
    x = 947,848,190.64/49,660.40
  6. Step 6: Final answer
    x = 19,086.60

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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.