Home / 2,129.73-2,939.01-1,245.35

Finding the Fourth Proportional to 2,129.73, 2,939.01 and 1,245.35

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Solution

The fourth proportional to 2,129.73, 2,939.01 and 1,245.35 is: 1,718.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.73 : 2,939.01 = 1,245.35 : x
  2. Step 2: Convert to fraction form
    2,129.73/2,939.01 = 1,245.35/x
  3. Step 3: Cross multiply
    2,129.73x = 2,939.01 × 1,245.35
  4. Step 4: Simplify right side
    2,129.73x = 3,660,096.10
  5. Step 5: Solve for x
    x = 3,660,096.10/2,129.73
  6. Step 6: Final answer
    x = 1,718.57

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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.