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Finding the Fourth Proportional to 8,280, 11,420.60 and 5,446.48

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Solution

The fourth proportional to 8,280, 11,420.60 and 5,446.48 is: 7,512.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,280 : 11,420.60 = 5,446.48 : x
  2. Step 2: Convert to fraction form
    8,280/11,420.60 = 5,446.48/x
  3. Step 3: Cross multiply
    8,280x = 11,420.60 × 5,446.48
  4. Step 4: Simplify right side
    8,280x = 62,202,069.49
  5. Step 5: Solve for x
    x = 62,202,069.49/8,280
  6. Step 6: Final answer
    x = 7,512.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.