Home / 4,980.64-6,874.32-2,991.28

Finding the Fourth Proportional to 4,980.64, 6,874.32 and 2,991.28

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Solution

The fourth proportional to 4,980.64, 6,874.32 and 2,991.28 is: 4,128.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,980.64 : 6,874.32 = 2,991.28 : x
  2. Step 2: Convert to fraction form
    4,980.64/6,874.32 = 2,991.28/x
  3. Step 3: Cross multiply
    4,980.64x = 6,874.32 × 2,991.28
  4. Step 4: Simplify right side
    4,980.64x = 20,563,015.93
  5. Step 5: Solve for x
    x = 20,563,015.93/4,980.64
  6. Step 6: Final answer
    x = 4,128.59

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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.