Home / 5,911.85-8,157.81-3,783.65

Finding the Fourth Proportional to 5,911.85, 8,157.81 and 3,783.65

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Solution

The fourth proportional to 5,911.85, 8,157.81 and 3,783.65 is: 5,221.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,911.85 : 8,157.81 = 3,783.65 : x
  2. Step 2: Convert to fraction form
    5,911.85/8,157.81 = 3,783.65/x
  3. Step 3: Cross multiply
    5,911.85x = 8,157.81 × 3,783.65
  4. Step 4: Simplify right side
    5,911.85x = 30,866,271.21
  5. Step 5: Solve for x
    x = 30,866,271.21/5,911.85
  6. Step 6: Final answer
    x = 5,221.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.