Home / 2,157.80-3,231.21-1,425.14

Finding the Fourth Proportional to 2,157.80, 3,231.21 and 1,425.14

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Solution

The fourth proportional to 2,157.80, 3,231.21 and 1,425.14 is: 2,134.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,157.80 : 3,231.21 = 1,425.14 : x
  2. Step 2: Convert to fraction form
    2,157.80/3,231.21 = 1,425.14/x
  3. Step 3: Cross multiply
    2,157.80x = 3,231.21 × 1,425.14
  4. Step 4: Simplify right side
    2,157.80x = 4,604,926.62
  5. Step 5: Solve for x
    x = 4,604,926.62/2,157.80
  6. Step 6: Final answer
    x = 2,134.08

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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.