Home / 2,979.36-4,112.64-2,141.28

Finding the Fourth Proportional to 2,979.36, 4,112.64 and 2,141.28

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Solution

The fourth proportional to 2,979.36, 4,112.64 and 2,141.28 is: 2,955.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,979.36 : 4,112.64 = 2,141.28 : x
  2. Step 2: Convert to fraction form
    2,979.36/4,112.64 = 2,141.28/x
  3. Step 3: Cross multiply
    2,979.36x = 4,112.64 × 2,141.28
  4. Step 4: Simplify right side
    2,979.36x = 8,806,313.78
  5. Step 5: Solve for x
    x = 8,806,313.78/2,979.36
  6. Step 6: Final answer
    x = 2,955.77

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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.