Home / 13,920.75-20,880.03-3,925.09

Finding the Fourth Proportional to 13,920.75, 20,880.03 and 3,925.09

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Solution

The fourth proportional to 13,920.75, 20,880.03 and 3,925.09 is: 5,887.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,920.75 : 20,880.03 = 3,925.09 : x
  2. Step 2: Convert to fraction form
    13,920.75/20,880.03 = 3,925.09/x
  3. Step 3: Cross multiply
    13,920.75x = 20,880.03 × 3,925.09
  4. Step 4: Simplify right side
    13,920.75x = 81,955,960.65
  5. Step 5: Solve for x
    x = 81,955,960.65/13,920.75
  6. Step 6: Final answer
    x = 5,887.33

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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.