Home / 2,111.70-2,914.32-1,272.66

Finding the Fourth Proportional to 2,111.70, 2,914.32 and 1,272.66

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Solution

The fourth proportional to 2,111.70, 2,914.32 and 1,272.66 is: 1,756.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,111.70 : 2,914.32 = 1,272.66 : x
  2. Step 2: Convert to fraction form
    2,111.70/2,914.32 = 1,272.66/x
  3. Step 3: Cross multiply
    2,111.70x = 2,914.32 × 1,272.66
  4. Step 4: Simplify right side
    2,111.70x = 3,708,938.49
  5. Step 5: Solve for x
    x = 3,708,938.49/2,111.70
  6. Step 6: Final answer
    x = 1,756.38

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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.