Home / 19,912.96-29,867.84-5,121.92

Finding the Fourth Proportional to 19,912.96, 29,867.84 and 5,121.92

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Solution

The fourth proportional to 19,912.96, 29,867.84 and 5,121.92 is: 7,682.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,912.96 : 29,867.84 = 5,121.92 : x
  2. Step 2: Convert to fraction form
    19,912.96/29,867.84 = 5,121.92/x
  3. Step 3: Cross multiply
    19,912.96x = 29,867.84 × 5,121.92
  4. Step 4: Simplify right side
    19,912.96x = 152,980,687.05
  5. Step 5: Solve for x
    x = 152,980,687.05/19,912.96
  6. Step 6: Final answer
    x = 7,682.47

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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.