Home / 2,122.80-2,945.92-2,036.40

Finding the Fourth Proportional to 2,122.80, 2,945.92 and 2,036.40

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Solution

The fourth proportional to 2,122.80, 2,945.92 and 2,036.40 is: 2,826.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,122.80 : 2,945.92 = 2,036.40 : x
  2. Step 2: Convert to fraction form
    2,122.80/2,945.92 = 2,036.40/x
  3. Step 3: Cross multiply
    2,122.80x = 2,945.92 × 2,036.40
  4. Step 4: Simplify right side
    2,122.80x = 5,999,071.49
  5. Step 5: Solve for x
    x = 5,999,071.49/2,122.80
  6. Step 6: Final answer
    x = 2,826.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.