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Finding the Fourth Proportional to 4,980.36, 6,868.38 and 4,090.92

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Solution

The fourth proportional to 4,980.36, 6,868.38 and 4,090.92 is: 5,641.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,980.36 : 6,868.38 = 4,090.92 : x
  2. Step 2: Convert to fraction form
    4,980.36/6,868.38 = 4,090.92/x
  3. Step 3: Cross multiply
    4,980.36x = 6,868.38 × 4,090.92
  4. Step 4: Simplify right side
    4,980.36x = 28,097,993.11
  5. Step 5: Solve for x
    x = 28,097,993.11/4,980.36
  6. Step 6: Final answer
    x = 5,641.76

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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.