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Finding the Fourth Proportional to 5,476.80, 8,215.20 and 5,054.40

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Solution

The fourth proportional to 5,476.80, 8,215.20 and 5,054.40 is: 7,581.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,476.80 : 8,215.20 = 5,054.40 : x
  2. Step 2: Convert to fraction form
    5,476.80/8,215.20 = 5,054.40/x
  3. Step 3: Cross multiply
    5,476.80x = 8,215.20 × 5,054.40
  4. Step 4: Simplify right side
    5,476.80x = 41,522,906.88
  5. Step 5: Solve for x
    x = 41,522,906.88/5,476.80
  6. Step 6: Final answer
    x = 7,581.60

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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.