Home / 2,121.78-2,929.06-1,414.80

Finding the Fourth Proportional to 2,121.78, 2,929.06 and 1,414.80

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Solution

The fourth proportional to 2,121.78, 2,929.06 and 1,414.80 is: 1,953.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.78 : 2,929.06 = 1,414.80 : x
  2. Step 2: Convert to fraction form
    2,121.78/2,929.06 = 1,414.80/x
  3. Step 3: Cross multiply
    2,121.78x = 2,929.06 × 1,414.80
  4. Step 4: Simplify right side
    2,121.78x = 4,144,027.01
  5. Step 5: Solve for x
    x = 4,144,027.01/2,121.78
  6. Step 6: Final answer
    x = 1,953.09

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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.