Home / 2,812.98-3,880.71-1,818.36

Finding the Fourth Proportional to 2,812.98, 3,880.71 and 1,818.36

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Solution

The fourth proportional to 2,812.98, 3,880.71 and 1,818.36 is: 2,508.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,812.98 : 3,880.71 = 1,818.36 : x
  2. Step 2: Convert to fraction form
    2,812.98/3,880.71 = 1,818.36/x
  3. Step 3: Cross multiply
    2,812.98x = 3,880.71 × 1,818.36
  4. Step 4: Simplify right side
    2,812.98x = 7,056,527.84
  5. Step 5: Solve for x
    x = 7,056,527.84/2,812.98
  6. Step 6: Final answer
    x = 2,508.56

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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.