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Finding the Fourth Proportional to 6,999.58, 9,660.12 and 5,228.11

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Solution

The fourth proportional to 6,999.58, 9,660.12 and 5,228.11 is: 7,215.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,999.58 : 9,660.12 = 5,228.11 : x
  2. Step 2: Convert to fraction form
    6,999.58/9,660.12 = 5,228.11/x
  3. Step 3: Cross multiply
    6,999.58x = 9,660.12 × 5,228.11
  4. Step 4: Simplify right side
    6,999.58x = 50,504,169.97
  5. Step 5: Solve for x
    x = 50,504,169.97/6,999.58
  6. Step 6: Final answer
    x = 7,215.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.