Home / 7,821.84-11,739.24-3,145.08

Finding the Fourth Proportional to 7,821.84, 11,739.24 and 3,145.08

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Solution

The fourth proportional to 7,821.84, 11,739.24 and 3,145.08 is: 4,720.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,821.84 : 11,739.24 = 3,145.08 : x
  2. Step 2: Convert to fraction form
    7,821.84/11,739.24 = 3,145.08/x
  3. Step 3: Cross multiply
    7,821.84x = 11,739.24 × 3,145.08
  4. Step 4: Simplify right side
    7,821.84x = 36,920,848.94
  5. Step 5: Solve for x
    x = 36,920,848.94/7,821.84
  6. Step 6: Final answer
    x = 4,720.23

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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.