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Finding the Fourth Proportional to 2,876.91, 3,970.79 and 2,036.73

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Solution

The fourth proportional to 2,876.91, 3,970.79 and 2,036.73 is: 2,811.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,876.91 : 3,970.79 = 2,036.73 : x
  2. Step 2: Convert to fraction form
    2,876.91/3,970.79 = 2,036.73/x
  3. Step 3: Cross multiply
    2,876.91x = 3,970.79 × 2,036.73
  4. Step 4: Simplify right side
    2,876.91x = 8,087,427.12
  5. Step 5: Solve for x
    x = 8,087,427.12/2,876.91
  6. Step 6: Final answer
    x = 2,811.15

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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.