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Finding the Fourth Proportional to 8,240.16, 12,360 and 3,308.40

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Solution

The fourth proportional to 8,240.16, 12,360 and 3,308.40 is: 4,962.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,240.16 : 12,360 = 3,308.40 : x
  2. Step 2: Convert to fraction form
    8,240.16/12,360 = 3,308.40/x
  3. Step 3: Cross multiply
    8,240.16x = 12,360 × 3,308.40
  4. Step 4: Simplify right side
    8,240.16x = 40,891,824
  5. Step 5: Solve for x
    x = 40,891,824/8,240.16
  6. Step 6: Final answer
    x = 4,962.50

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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.