Home / 20,478.24-30,703.68-7,999.38

Finding the Fourth Proportional to 20,478.24, 30,703.68 and 7,999.38

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Solution

The fourth proportional to 20,478.24, 30,703.68 and 7,999.38 is: 11,993.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,478.24 : 30,703.68 = 7,999.38 : x
  2. Step 2: Convert to fraction form
    20,478.24/30,703.68 = 7,999.38/x
  3. Step 3: Cross multiply
    20,478.24x = 30,703.68 × 7,999.38
  4. Step 4: Simplify right side
    20,478.24x = 245,610,403.72
  5. Step 5: Solve for x
    x = 245,610,403.72/20,478.24
  6. Step 6: Final answer
    x = 11,993.73

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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.