Home / 2,152.80-3,211.97-1,918.91

Finding the Fourth Proportional to 2,152.80, 3,211.97 and 1,918.91

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Solution

The fourth proportional to 2,152.80, 3,211.97 and 1,918.91 is: 2,863.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,152.80 : 3,211.97 = 1,918.91 : x
  2. Step 2: Convert to fraction form
    2,152.80/3,211.97 = 1,918.91/x
  3. Step 3: Cross multiply
    2,152.80x = 3,211.97 × 1,918.91
  4. Step 4: Simplify right side
    2,152.80x = 6,163,479.79
  5. Step 5: Solve for x
    x = 6,163,479.79/2,152.80
  6. Step 6: Final answer
    x = 2,863.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.