Home / 6,900.38-10,352.60-3,980.78

Finding the Fourth Proportional to 6,900.38, 10,352.60 and 3,980.78

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Solution

The fourth proportional to 6,900.38, 10,352.60 and 3,980.78 is: 5,972.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,900.38 : 10,352.60 = 3,980.78 : x
  2. Step 2: Convert to fraction form
    6,900.38/10,352.60 = 3,980.78/x
  3. Step 3: Cross multiply
    6,900.38x = 10,352.60 × 3,980.78
  4. Step 4: Simplify right side
    6,900.38x = 41,211,423.03
  5. Step 5: Solve for x
    x = 41,211,423.03/6,900.38
  6. Step 6: Final answer
    x = 5,972.34

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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.