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Finding the Fourth Proportional to 7,251.20, 10,880.90 and 3,090.78

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Solution

The fourth proportional to 7,251.20, 10,880.90 and 3,090.78 is: 4,637.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,251.20 : 10,880.90 = 3,090.78 : x
  2. Step 2: Convert to fraction form
    7,251.20/10,880.90 = 3,090.78/x
  3. Step 3: Cross multiply
    7,251.20x = 10,880.90 × 3,090.78
  4. Step 4: Simplify right side
    7,251.20x = 33,630,468.10
  5. Step 5: Solve for x
    x = 33,630,468.10/7,251.20
  6. Step 6: Final answer
    x = 4,637.92

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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.