Home / 5,430.87-8,147.93-3,120.75

Finding the Fourth Proportional to 5,430.87, 8,147.93 and 3,120.75

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Solution

The fourth proportional to 5,430.87, 8,147.93 and 3,120.75 is: 4,682.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,430.87 : 8,147.93 = 3,120.75 : x
  2. Step 2: Convert to fraction form
    5,430.87/8,147.93 = 3,120.75/x
  3. Step 3: Cross multiply
    5,430.87x = 8,147.93 × 3,120.75
  4. Step 4: Simplify right side
    5,430.87x = 25,427,636.94
  5. Step 5: Solve for x
    x = 25,427,636.94/5,430.87
  6. Step 6: Final answer
    x = 4,682.06

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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.