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Finding the Fourth Proportional to 7,920.03, 11,880.42 and 2,076.64

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Solution

The fourth proportional to 7,920.03, 11,880.42 and 2,076.64 is: 3,115.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,920.03 : 11,880.42 = 2,076.64 : x
  2. Step 2: Convert to fraction form
    7,920.03/11,880.42 = 2,076.64/x
  3. Step 3: Cross multiply
    7,920.03x = 11,880.42 × 2,076.64
  4. Step 4: Simplify right side
    7,920.03x = 24,671,355.39
  5. Step 5: Solve for x
    x = 24,671,355.39/7,920.03
  6. Step 6: Final answer
    x = 3,115.06

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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.