Home / 5,811.48-8,715.04-2,112.80

Finding the Fourth Proportional to 5,811.48, 8,715.04 and 2,112.80

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Solution

The fourth proportional to 5,811.48, 8,715.04 and 2,112.80 is: 3,168.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,811.48 : 8,715.04 = 2,112.80 : x
  2. Step 2: Convert to fraction form
    5,811.48/8,715.04 = 2,112.80/x
  3. Step 3: Cross multiply
    5,811.48x = 8,715.04 × 2,112.80
  4. Step 4: Simplify right side
    5,811.48x = 18,413,087.65
  5. Step 5: Solve for x
    x = 18,413,087.65/5,811.48
  6. Step 6: Final answer
    x = 3,168.40

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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.