Home / 6,921.12-10,380-3,457.56

Finding the Fourth Proportional to 6,921.12, 10,380 and 3,457.56

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Solution

The fourth proportional to 6,921.12, 10,380 and 3,457.56 is: 5,185.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,921.12 : 10,380 = 3,457.56 : x
  2. Step 2: Convert to fraction form
    6,921.12/10,380 = 3,457.56/x
  3. Step 3: Cross multiply
    6,921.12x = 10,380 × 3,457.56
  4. Step 4: Simplify right side
    6,921.12x = 35,889,472.80
  5. Step 5: Solve for x
    x = 35,889,472.80/6,921.12
  6. Step 6: Final answer
    x = 5,185.50

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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.