Home / 2,121.72-2,927.70-1,237.38

Finding the Fourth Proportional to 2,121.72, 2,927.70 and 1,237.38

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Solution

The fourth proportional to 2,121.72, 2,927.70 and 1,237.38 is: 1,707.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.72 : 2,927.70 = 1,237.38 : x
  2. Step 2: Convert to fraction form
    2,121.72/2,927.70 = 1,237.38/x
  3. Step 3: Cross multiply
    2,121.72x = 2,927.70 × 1,237.38
  4. Step 4: Simplify right side
    2,121.72x = 3,622,677.43
  5. Step 5: Solve for x
    x = 3,622,677.43/2,121.72
  6. Step 6: Final answer
    x = 1,707.42

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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.