Home / 7,880.75-11,821.10-5,408.06

Finding the Fourth Proportional to 7,880.75, 11,821.10 and 5,408.06

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Solution

The fourth proportional to 7,880.75, 11,821.10 and 5,408.06 is: 8,112.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,880.75 : 11,821.10 = 5,408.06 : x
  2. Step 2: Convert to fraction form
    7,880.75/11,821.10 = 5,408.06/x
  3. Step 3: Cross multiply
    7,880.75x = 11,821.10 × 5,408.06
  4. Step 4: Simplify right side
    7,880.75x = 63,929,218.07
  5. Step 5: Solve for x
    x = 63,929,218.07/7,880.75
  6. Step 6: Final answer
    x = 8,112.08

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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.