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Finding the Fourth Proportional to 8,640.90, 12,963.15 and 4,940.10

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Solution

The fourth proportional to 8,640.90, 12,963.15 and 4,940.10 is: 7,411.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,640.90 : 12,963.15 = 4,940.10 : x
  2. Step 2: Convert to fraction form
    8,640.90/12,963.15 = 4,940.10/x
  3. Step 3: Cross multiply
    8,640.90x = 12,963.15 × 4,940.10
  4. Step 4: Simplify right side
    8,640.90x = 64,039,257.32
  5. Step 5: Solve for x
    x = 64,039,257.32/8,640.90
  6. Step 6: Final answer
    x = 7,411.18

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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.