Home / 8,087.36-12,128.46-3,155.80

Finding the Fourth Proportional to 8,087.36, 12,128.46 and 3,155.80

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Solution

The fourth proportional to 8,087.36, 12,128.46 and 3,155.80 is: 4,732.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,087.36 : 12,128.46 = 3,155.80 : x
  2. Step 2: Convert to fraction form
    8,087.36/12,128.46 = 3,155.80/x
  3. Step 3: Cross multiply
    8,087.36x = 12,128.46 × 3,155.80
  4. Step 4: Simplify right side
    8,087.36x = 38,274,994.07
  5. Step 5: Solve for x
    x = 38,274,994.07/8,087.36
  6. Step 6: Final answer
    x = 4,732.69

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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.