Home / 6,971.40-9,619.92-4,138.56

Finding the Fourth Proportional to 6,971.40, 9,619.92 and 4,138.56

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Solution

The fourth proportional to 6,971.40, 9,619.92 and 4,138.56 is: 5,710.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,971.40 : 9,619.92 = 4,138.56 : x
  2. Step 2: Convert to fraction form
    6,971.40/9,619.92 = 4,138.56/x
  3. Step 3: Cross multiply
    6,971.40x = 9,619.92 × 4,138.56
  4. Step 4: Simplify right side
    6,971.40x = 39,812,616.12
  5. Step 5: Solve for x
    x = 39,812,616.12/6,971.40
  6. Step 6: Final answer
    x = 5,710.85

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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.