Home / 13,640.80-20,439.60-8,701.60

Finding the Fourth Proportional to 13,640.80, 20,439.60 and 8,701.60

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Solution

The fourth proportional to 13,640.80, 20,439.60 and 8,701.60 is: 13,038.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,640.80 : 20,439.60 = 8,701.60 : x
  2. Step 2: Convert to fraction form
    13,640.80/20,439.60 = 8,701.60/x
  3. Step 3: Cross multiply
    13,640.80x = 20,439.60 × 8,701.60
  4. Step 4: Simplify right side
    13,640.80x = 177,857,223.36
  5. Step 5: Solve for x
    x = 177,857,223.36/13,640.80
  6. Step 6: Final answer
    x = 13,038.62

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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.