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Finding the Fourth Proportional to 8,411.78, 12,612.21 and 3,476.45

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Solution

The fourth proportional to 8,411.78, 12,612.21 and 3,476.45 is: 5,212.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,411.78 : 12,612.21 = 3,476.45 : x
  2. Step 2: Convert to fraction form
    8,411.78/12,612.21 = 3,476.45/x
  3. Step 3: Cross multiply
    8,411.78x = 12,612.21 × 3,476.45
  4. Step 4: Simplify right side
    8,411.78x = 43,845,735.95
  5. Step 5: Solve for x
    x = 43,845,735.95/8,411.78
  6. Step 6: Final answer
    x = 5,212.42

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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.