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Finding the Fourth Proportional to 43,622.40, 65,433.60 and 12,453.60

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Solution

The fourth proportional to 43,622.40, 65,433.60 and 12,453.60 is: 18,680.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,622.40 : 65,433.60 = 12,453.60 : x
  2. Step 2: Convert to fraction form
    43,622.40/65,433.60 = 12,453.60/x
  3. Step 3: Cross multiply
    43,622.40x = 65,433.60 × 12,453.60
  4. Step 4: Simplify right side
    43,622.40x = 814,883,880.96
  5. Step 5: Solve for x
    x = 814,883,880.96/43,622.40
  6. Step 6: Final answer
    x = 18,680.40

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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.