Home / 6,724.72-9,278.76-3,929.68

Finding the Fourth Proportional to 6,724.72, 9,278.76 and 3,929.68

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Solution

The fourth proportional to 6,724.72, 9,278.76 and 3,929.68 is: 5,422.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,724.72 : 9,278.76 = 3,929.68 : x
  2. Step 2: Convert to fraction form
    6,724.72/9,278.76 = 3,929.68/x
  3. Step 3: Cross multiply
    6,724.72x = 9,278.76 × 3,929.68
  4. Step 4: Simplify right side
    6,724.72x = 36,462,557.60
  5. Step 5: Solve for x
    x = 36,462,557.60/6,724.72
  6. Step 6: Final answer
    x = 5,422.17

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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.