Home / 19,912.10-29,868.51-5,121.20

Finding the Fourth Proportional to 19,912.10, 29,868.51 and 5,121.20

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Solution

The fourth proportional to 19,912.10, 29,868.51 and 5,121.20 is: 7,681.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,912.10 : 29,868.51 = 5,121.20 : x
  2. Step 2: Convert to fraction form
    19,912.10/29,868.51 = 5,121.20/x
  3. Step 3: Cross multiply
    19,912.10x = 29,868.51 × 5,121.20
  4. Step 4: Simplify right side
    19,912.10x = 152,962,613.41
  5. Step 5: Solve for x
    x = 152,962,613.41/19,912.10
  6. Step 6: Final answer
    x = 7,681.89

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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.