Home / 9,120.04-13,680.36-2,880.12

Finding the Fourth Proportional to 9,120.04, 13,680.36 and 2,880.12

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Solution

The fourth proportional to 9,120.04, 13,680.36 and 2,880.12 is: 4,320.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,120.04 : 13,680.36 = 2,880.12 : x
  2. Step 2: Convert to fraction form
    9,120.04/13,680.36 = 2,880.12/x
  3. Step 3: Cross multiply
    9,120.04x = 13,680.36 × 2,880.12
  4. Step 4: Simplify right side
    9,120.04x = 39,401,078.44
  5. Step 5: Solve for x
    x = 39,401,078.44/9,120.04
  6. Step 6: Final answer
    x = 4,320.27

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Double scale
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Similar ratio
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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.