Home / 20,627.80-30,945.58-7,115.38

Finding the Fourth Proportional to 20,627.80, 30,945.58 and 7,115.38

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Solution

The fourth proportional to 20,627.80, 30,945.58 and 7,115.38 is: 10,674.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,627.80 : 30,945.58 = 7,115.38 : x
  2. Step 2: Convert to fraction form
    20,627.80/30,945.58 = 7,115.38/x
  3. Step 3: Cross multiply
    20,627.80x = 30,945.58 × 7,115.38
  4. Step 4: Simplify right side
    20,627.80x = 220,189,465.87
  5. Step 5: Solve for x
    x = 220,189,465.87/20,627.80
  6. Step 6: Final answer
    x = 10,674.41

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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.