Home / 7,859.20-11,784.32-4,161.28

Finding the Fourth Proportional to 7,859.20, 11,784.32 and 4,161.28

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Solution

The fourth proportional to 7,859.20, 11,784.32 and 4,161.28 is: 6,239.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,859.20 : 11,784.32 = 4,161.28 : x
  2. Step 2: Convert to fraction form
    7,859.20/11,784.32 = 4,161.28/x
  3. Step 3: Cross multiply
    7,859.20x = 11,784.32 × 4,161.28
  4. Step 4: Simplify right side
    7,859.20x = 49,037,855.13
  5. Step 5: Solve for x
    x = 49,037,855.13/7,859.20
  6. Step 6: Final answer
    x = 6,239.55

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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.