Home / 20,669.78-30,999.98-5,878.37

Finding the Fourth Proportional to 20,669.78, 30,999.98 and 5,878.37

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Solution

The fourth proportional to 20,669.78, 30,999.98 and 5,878.37 is: 8,816.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,669.78 : 30,999.98 = 5,878.37 : x
  2. Step 2: Convert to fraction form
    20,669.78/30,999.98 = 5,878.37/x
  3. Step 3: Cross multiply
    20,669.78x = 30,999.98 × 5,878.37
  4. Step 4: Simplify right side
    20,669.78x = 182,229,168.04
  5. Step 5: Solve for x
    x = 182,229,168.04/20,669.78
  6. Step 6: Final answer
    x = 8,816.21

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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.