Home / 13,121.75-19,688.43-6,880.26

Finding the Fourth Proportional to 13,121.75, 19,688.43 and 6,880.26

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Solution

The fourth proportional to 13,121.75, 19,688.43 and 6,880.26 is: 10,323.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.75 : 19,688.43 = 6,880.26 : x
  2. Step 2: Convert to fraction form
    13,121.75/19,688.43 = 6,880.26/x
  3. Step 3: Cross multiply
    13,121.75x = 19,688.43 × 6,880.26
  4. Step 4: Simplify right side
    13,121.75x = 135,461,517.39
  5. Step 5: Solve for x
    x = 135,461,517.39/13,121.75
  6. Step 6: Final answer
    x = 10,323.44

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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.