Home / 5,409.56-8,128.01-5,190.86

Finding the Fourth Proportional to 5,409.56, 8,128.01 and 5,190.86

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Solution

The fourth proportional to 5,409.56, 8,128.01 and 5,190.86 is: 7,799.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,409.56 : 8,128.01 = 5,190.86 : x
  2. Step 2: Convert to fraction form
    5,409.56/8,128.01 = 5,190.86/x
  3. Step 3: Cross multiply
    5,409.56x = 8,128.01 × 5,190.86
  4. Step 4: Simplify right side
    5,409.56x = 42,191,361.99
  5. Step 5: Solve for x
    x = 42,191,361.99/5,409.56
  6. Step 6: Final answer
    x = 7,799.41

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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.