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Finding the Fourth Proportional to 25,380.81, 38,071.22 and 6,912.81

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Solution

The fourth proportional to 25,380.81, 38,071.22 and 6,912.81 is: 10,369.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,380.81 : 38,071.22 = 6,912.81 : x
  2. Step 2: Convert to fraction form
    25,380.81/38,071.22 = 6,912.81/x
  3. Step 3: Cross multiply
    25,380.81x = 38,071.22 × 6,912.81
  4. Step 4: Simplify right side
    25,380.81x = 263,179,205.51
  5. Step 5: Solve for x
    x = 263,179,205.51/25,380.81
  6. Step 6: Final answer
    x = 10,369.22

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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.