Home / 2,121.40-3,185.70-2,056.60

Finding the Fourth Proportional to 2,121.40, 3,185.70 and 2,056.60

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Solution

The fourth proportional to 2,121.40, 3,185.70 and 2,056.60 is: 3,088.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.40 : 3,185.70 = 2,056.60 : x
  2. Step 2: Convert to fraction form
    2,121.40/3,185.70 = 2,056.60/x
  3. Step 3: Cross multiply
    2,121.40x = 3,185.70 × 2,056.60
  4. Step 4: Simplify right side
    2,121.40x = 6,551,710.62
  5. Step 5: Solve for x
    x = 6,551,710.62/2,121.40
  6. Step 6: Final answer
    x = 3,088.39

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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.