Home / 13,121.80-19,678.34-4,800.26

Finding the Fourth Proportional to 13,121.80, 19,678.34 and 4,800.26

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Solution

The fourth proportional to 13,121.80, 19,678.34 and 4,800.26 is: 7,198.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.80 : 19,678.34 = 4,800.26 : x
  2. Step 2: Convert to fraction form
    13,121.80/19,678.34 = 4,800.26/x
  3. Step 3: Cross multiply
    13,121.80x = 19,678.34 × 4,800.26
  4. Step 4: Simplify right side
    13,121.80x = 94,461,209.56
  5. Step 5: Solve for x
    x = 94,461,209.56/13,121.80
  6. Step 6: Final answer
    x = 7,198.80

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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.