Home / 3,106.81-4,287.00-2,100.70

Finding the Fourth Proportional to 3,106.81, 4,287.00 and 2,100.70

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Solution

The fourth proportional to 3,106.81, 4,287.00 and 2,100.70 is: 2,898.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,106.81 : 4,287.00 = 2,100.70 : x
  2. Step 2: Convert to fraction form
    3,106.81/4,287.00 = 2,100.70/x
  3. Step 3: Cross multiply
    3,106.81x = 4,287.00 × 2,100.70
  4. Step 4: Simplify right side
    3,106.81x = 9,005,714.14
  5. Step 5: Solve for x
    x = 9,005,714.14/3,106.81
  6. Step 6: Final answer
    x = 2,898.70

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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.