Home / 5,218.24-7,828-2,139.84

Finding the Fourth Proportional to 5,218.24, 7,828 and 2,139.84

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Solution

The fourth proportional to 5,218.24, 7,828 and 2,139.84 is: 3,210.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,218.24 : 7,828 = 2,139.84 : x
  2. Step 2: Convert to fraction form
    5,218.24/7,828 = 2,139.84/x
  3. Step 3: Cross multiply
    5,218.24x = 7,828 × 2,139.84
  4. Step 4: Simplify right side
    5,218.24x = 16,750,667.52
  5. Step 5: Solve for x
    x = 16,750,667.52/5,218.24
  6. Step 6: Final answer
    x = 3,210.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.