Home / 19,912.28-29,869.49-5,121.32

Finding the Fourth Proportional to 19,912.28, 29,869.49 and 5,121.32

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Solution

The fourth proportional to 19,912.28, 29,869.49 and 5,121.32 is: 7,682.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,912.28 : 29,869.49 = 5,121.32 : x
  2. Step 2: Convert to fraction form
    19,912.28/29,869.49 = 5,121.32/x
  3. Step 3: Cross multiply
    19,912.28x = 29,869.49 × 5,121.32
  4. Step 4: Simplify right side
    19,912.28x = 152,971,079.98
  5. Step 5: Solve for x
    x = 152,971,079.98/19,912.28
  6. Step 6: Final answer
    x = 7,682.25

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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.