Home / 5,218.70-7,201.61-2,860.79

Finding the Fourth Proportional to 5,218.70, 7,201.61 and 2,860.79

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Solution

The fourth proportional to 5,218.70, 7,201.61 and 2,860.79 is: 3,947.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,218.70 : 7,201.61 = 2,860.79 : x
  2. Step 2: Convert to fraction form
    5,218.70/7,201.61 = 2,860.79/x
  3. Step 3: Cross multiply
    5,218.70x = 7,201.61 × 2,860.79
  4. Step 4: Simplify right side
    5,218.70x = 20,602,254.29
  5. Step 5: Solve for x
    x = 20,602,254.29/5,218.70
  6. Step 6: Final answer
    x = 3,947.78

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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.