Home / 7,078.85-9,768.60-3,892.14

Finding the Fourth Proportional to 7,078.85, 9,768.60 and 3,892.14

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Solution

The fourth proportional to 7,078.85, 9,768.60 and 3,892.14 is: 5,371.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,078.85 : 9,768.60 = 3,892.14 : x
  2. Step 2: Convert to fraction form
    7,078.85/9,768.60 = 3,892.14/x
  3. Step 3: Cross multiply
    7,078.85x = 9,768.60 × 3,892.14
  4. Step 4: Simplify right side
    7,078.85x = 38,020,690.50
  5. Step 5: Solve for x
    x = 38,020,690.50/7,078.85
  6. Step 6: Final answer
    x = 5,371.03

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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.