Home / 2,911.55-4,021.20-1,965.69

Finding the Fourth Proportional to 2,911.55, 4,021.20 and 1,965.69

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Solution

The fourth proportional to 2,911.55, 4,021.20 and 1,965.69 is: 2,714.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,911.55 : 4,021.20 = 1,965.69 : x
  2. Step 2: Convert to fraction form
    2,911.55/4,021.20 = 1,965.69/x
  3. Step 3: Cross multiply
    2,911.55x = 4,021.20 × 1,965.69
  4. Step 4: Simplify right side
    2,911.55x = 7,904,432.63
  5. Step 5: Solve for x
    x = 7,904,432.63/2,911.55
  6. Step 6: Final answer
    x = 2,714.86

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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.