Home / 51,121.36-76,636.68-19,978.48

Finding the Fourth Proportional to 51,121.36, 76,636.68 and 19,978.48

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Solution

The fourth proportional to 51,121.36, 76,636.68 and 19,978.48 is: 29,949.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,121.36 : 76,636.68 = 19,978.48 : x
  2. Step 2: Convert to fraction form
    51,121.36/76,636.68 = 19,978.48/x
  3. Step 3: Cross multiply
    51,121.36x = 76,636.68 × 19,978.48
  4. Step 4: Simplify right side
    51,121.36x = 1,531,084,378.65
  5. Step 5: Solve for x
    x = 1,531,084,378.65/51,121.36
  6. Step 6: Final answer
    x = 29,949.99

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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.