Home / 7,120.46-10,680.70-3,220.32

Finding the Fourth Proportional to 7,120.46, 10,680.70 and 3,220.32

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Solution

The fourth proportional to 7,120.46, 10,680.70 and 3,220.32 is: 4,830.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,120.46 : 10,680.70 = 3,220.32 : x
  2. Step 2: Convert to fraction form
    7,120.46/10,680.70 = 3,220.32/x
  3. Step 3: Cross multiply
    7,120.46x = 10,680.70 × 3,220.32
  4. Step 4: Simplify right side
    7,120.46x = 34,395,271.82
  5. Step 5: Solve for x
    x = 34,395,271.82/7,120.46
  6. Step 6: Final answer
    x = 4,830.48

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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.