Home / 8,087.80-12,131.70-3,157.60

Finding the Fourth Proportional to 8,087.80, 12,131.70 and 3,157.60

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Solution

The fourth proportional to 8,087.80, 12,131.70 and 3,157.60 is: 4,736.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,087.80 : 12,131.70 = 3,157.60 : x
  2. Step 2: Convert to fraction form
    8,087.80/12,131.70 = 3,157.60/x
  3. Step 3: Cross multiply
    8,087.80x = 12,131.70 × 3,157.60
  4. Step 4: Simplify right side
    8,087.80x = 38,307,055.92
  5. Step 5: Solve for x
    x = 38,307,055.92/8,087.80
  6. Step 6: Final answer
    x = 4,736.40

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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.