Home / 5,218.87-7,201.65-2,980.45

Finding the Fourth Proportional to 5,218.87, 7,201.65 and 2,980.45

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Solution

The fourth proportional to 5,218.87, 7,201.65 and 2,980.45 is: 4,112.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,218.87 : 7,201.65 = 2,980.45 : x
  2. Step 2: Convert to fraction form
    5,218.87/7,201.65 = 2,980.45/x
  3. Step 3: Cross multiply
    5,218.87x = 7,201.65 × 2,980.45
  4. Step 4: Simplify right side
    5,218.87x = 21,464,157.74
  5. Step 5: Solve for x
    x = 21,464,157.74/5,218.87
  6. Step 6: Final answer
    x = 4,112.80

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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.