Home / 7,920.40-11,880.24-3,757.36

Finding the Fourth Proportional to 7,920.40, 11,880.24 and 3,757.36

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Solution

The fourth proportional to 7,920.40, 11,880.24 and 3,757.36 is: 5,635.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,920.40 : 11,880.24 = 3,757.36 : x
  2. Step 2: Convert to fraction form
    7,920.40/11,880.24 = 3,757.36/x
  3. Step 3: Cross multiply
    7,920.40x = 11,880.24 × 3,757.36
  4. Step 4: Simplify right side
    7,920.40x = 44,638,338.57
  5. Step 5: Solve for x
    x = 44,638,338.57/7,920.40
  6. Step 6: Final answer
    x = 5,635.87

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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.