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Finding the Fourth Proportional to 7,920.55, 11,880.56 and 3,763.54

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Solution

The fourth proportional to 7,920.55, 11,880.56 and 3,763.54 is: 5,645.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,920.55 : 11,880.56 = 3,763.54 : x
  2. Step 2: Convert to fraction form
    7,920.55/11,880.56 = 3,763.54/x
  3. Step 3: Cross multiply
    7,920.55x = 11,880.56 × 3,763.54
  4. Step 4: Simplify right side
    7,920.55x = 44,712,962.78
  5. Step 5: Solve for x
    x = 44,712,962.78/7,920.55
  6. Step 6: Final answer
    x = 5,645.18

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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.