Home / 7,121.76-9,826.30-4,135.84

Finding the Fourth Proportional to 7,121.76, 9,826.30 and 4,135.84

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Solution

The fourth proportional to 7,121.76, 9,826.30 and 4,135.84 is: 5,706.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.76 : 9,826.30 = 4,135.84 : x
  2. Step 2: Convert to fraction form
    7,121.76/9,826.30 = 4,135.84/x
  3. Step 3: Cross multiply
    7,121.76x = 9,826.30 × 4,135.84
  4. Step 4: Simplify right side
    7,121.76x = 40,640,004.59
  5. Step 5: Solve for x
    x = 40,640,004.59/7,121.76
  6. Step 6: Final answer
    x = 5,706.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.