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Finding the Fourth Proportional to 6,612.88, 9,127.20 and 3,960.40

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Solution

The fourth proportional to 6,612.88, 9,127.20 and 3,960.40 is: 5,466.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,612.88 : 9,127.20 = 3,960.40 : x
  2. Step 2: Convert to fraction form
    6,612.88/9,127.20 = 3,960.40/x
  3. Step 3: Cross multiply
    6,612.88x = 9,127.20 × 3,960.40
  4. Step 4: Simplify right side
    6,612.88x = 36,147,362.88
  5. Step 5: Solve for x
    x = 36,147,362.88/6,612.88
  6. Step 6: Final answer
    x = 5,466.21

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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.