Home / 7,120.50-9,826.32-3,977.46

Finding the Fourth Proportional to 7,120.50, 9,826.32 and 3,977.46

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Solution

The fourth proportional to 7,120.50, 9,826.32 and 3,977.46 is: 5,488.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,120.50 : 9,826.32 = 3,977.46 : x
  2. Step 2: Convert to fraction form
    7,120.50/9,826.32 = 3,977.46/x
  3. Step 3: Cross multiply
    7,120.50x = 9,826.32 × 3,977.46
  4. Step 4: Simplify right side
    7,120.50x = 39,083,794.75
  5. Step 5: Solve for x
    x = 39,083,794.75/7,120.50
  6. Step 6: Final answer
    x = 5,488.91

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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.