Home / 5,438.20-8,157.30-1,975

Finding the Fourth Proportional to 5,438.20, 8,157.30 and 1,975

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Solution

The fourth proportional to 5,438.20, 8,157.30 and 1,975 is: 2,962.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,438.20 : 8,157.30 = 1,975 : x
  2. Step 2: Convert to fraction form
    5,438.20/8,157.30 = 1,975/x
  3. Step 3: Cross multiply
    5,438.20x = 8,157.30 × 1,975
  4. Step 4: Simplify right side
    5,438.20x = 16,110,667.50
  5. Step 5: Solve for x
    x = 16,110,667.50/5,438.20
  6. Step 6: Final answer
    x = 2,962.50

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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.