Home / 5,428.80-8,145.60-2,505.60

Finding the Fourth Proportional to 5,428.80, 8,145.60 and 2,505.60

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Solution

The fourth proportional to 5,428.80, 8,145.60 and 2,505.60 is: 3,759.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,428.80 : 8,145.60 = 2,505.60 : x
  2. Step 2: Convert to fraction form
    5,428.80/8,145.60 = 2,505.60/x
  3. Step 3: Cross multiply
    5,428.80x = 8,145.60 × 2,505.60
  4. Step 4: Simplify right side
    5,428.80x = 20,409,615.36
  5. Step 5: Solve for x
    x = 20,409,615.36/5,428.80
  6. Step 6: Final answer
    x = 3,759.51

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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.