Home / 7,429.60-11,149.28-2,812.64

Finding the Fourth Proportional to 7,429.60, 11,149.28 and 2,812.64

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Solution

The fourth proportional to 7,429.60, 11,149.28 and 2,812.64 is: 4,220.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,429.60 : 11,149.28 = 2,812.64 : x
  2. Step 2: Convert to fraction form
    7,429.60/11,149.28 = 2,812.64/x
  3. Step 3: Cross multiply
    7,429.60x = 11,149.28 × 2,812.64
  4. Step 4: Simplify right side
    7,429.60x = 31,358,910.90
  5. Step 5: Solve for x
    x = 31,358,910.90/7,429.60
  6. Step 6: Final answer
    x = 4,220.81

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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.