Home / 5,372.80-8,066.40-3,428.80

Finding the Fourth Proportional to 5,372.80, 8,066.40 and 3,428.80

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Solution

The fourth proportional to 5,372.80, 8,066.40 and 3,428.80 is: 5,147.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,372.80 : 8,066.40 = 3,428.80 : x
  2. Step 2: Convert to fraction form
    5,372.80/8,066.40 = 3,428.80/x
  3. Step 3: Cross multiply
    5,372.80x = 8,066.40 × 3,428.80
  4. Step 4: Simplify right side
    5,372.80x = 27,658,072.32
  5. Step 5: Solve for x
    x = 27,658,072.32/5,372.80
  6. Step 6: Final answer
    x = 5,147.79

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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.