Home / 2,985.36-4,120.92-2,147.28

Finding the Fourth Proportional to 2,985.36, 4,120.92 and 2,147.28

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Solution

The fourth proportional to 2,985.36, 4,120.92 and 2,147.28 is: 2,964.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,985.36 : 4,120.92 = 2,147.28 : x
  2. Step 2: Convert to fraction form
    2,985.36/4,120.92 = 2,147.28/x
  3. Step 3: Cross multiply
    2,985.36x = 4,120.92 × 2,147.28
  4. Step 4: Simplify right side
    2,985.36x = 8,848,769.10
  5. Step 5: Solve for x
    x = 8,848,769.10/2,985.36
  6. Step 6: Final answer
    x = 2,964.05

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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.