Home / 8,639.67-11,922.55-4,811.28

Finding the Fourth Proportional to 8,639.67, 11,922.55 and 4,811.28

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Solution

The fourth proportional to 8,639.67, 11,922.55 and 4,811.28 is: 6,639.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.67 : 11,922.55 = 4,811.28 : x
  2. Step 2: Convert to fraction form
    8,639.67/11,922.55 = 4,811.28/x
  3. Step 3: Cross multiply
    8,639.67x = 11,922.55 × 4,811.28
  4. Step 4: Simplify right side
    8,639.67x = 57,362,687.67
  5. Step 5: Solve for x
    x = 57,362,687.67/8,639.67
  6. Step 6: Final answer
    x = 6,639.46

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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.