Home / 7,921.49-11,880.37-2,656.70

Finding the Fourth Proportional to 7,921.49, 11,880.37 and 2,656.70

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Solution

The fourth proportional to 7,921.49, 11,880.37 and 2,656.70 is: 3,984.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,921.49 : 11,880.37 = 2,656.70 : x
  2. Step 2: Convert to fraction form
    7,921.49/11,880.37 = 2,656.70/x
  3. Step 3: Cross multiply
    7,921.49x = 11,880.37 × 2,656.70
  4. Step 4: Simplify right side
    7,921.49x = 31,562,512.94
  5. Step 5: Solve for x
    x = 31,562,512.94/7,921.49
  6. Step 6: Final answer
    x = 3,984.41

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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.