Home / 7,845.75-11,772.68-5,215.07

Finding the Fourth Proportional to 7,845.75, 11,772.68 and 5,215.07

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Solution

The fourth proportional to 7,845.75, 11,772.68 and 5,215.07 is: 7,825.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,845.75 : 11,772.68 = 5,215.07 : x
  2. Step 2: Convert to fraction form
    7,845.75/11,772.68 = 5,215.07/x
  3. Step 3: Cross multiply
    7,845.75x = 11,772.68 × 5,215.07
  4. Step 4: Simplify right side
    7,845.75x = 61,395,353.64
  5. Step 5: Solve for x
    x = 61,395,353.64/7,845.75
  6. Step 6: Final answer
    x = 7,825.30

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1.5x scale

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.