Home / 9,153.84-13,728.60-4,220.40

Finding the Fourth Proportional to 9,153.84, 13,728.60 and 4,220.40

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Solution

The fourth proportional to 9,153.84, 13,728.60 and 4,220.40 is: 6,329.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,153.84 : 13,728.60 = 4,220.40 : x
  2. Step 2: Convert to fraction form
    9,153.84/13,728.60 = 4,220.40/x
  3. Step 3: Cross multiply
    9,153.84x = 13,728.60 × 4,220.40
  4. Step 4: Simplify right side
    9,153.84x = 57,940,183.44
  5. Step 5: Solve for x
    x = 57,940,183.44/9,153.84
  6. Step 6: Final answer
    x = 6,329.60

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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.