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Finding the Fourth Proportional to 14,640.40, 21,960.60 and 13,923.60

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Solution

The fourth proportional to 14,640.40, 21,960.60 and 13,923.60 is: 20,885.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,640.40 : 21,960.60 = 13,923.60 : x
  2. Step 2: Convert to fraction form
    14,640.40/21,960.60 = 13,923.60/x
  3. Step 3: Cross multiply
    14,640.40x = 21,960.60 × 13,923.60
  4. Step 4: Simplify right side
    14,640.40x = 305,770,610.16
  5. Step 5: Solve for x
    x = 305,770,610.16/14,640.40
  6. Step 6: Final answer
    x = 20,885.40

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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.