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Finding the Fourth Proportional to 12,640.88, 18,812.04 and 12,220.44

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Solution

The fourth proportional to 12,640.88, 18,812.04 and 12,220.44 is: 18,186.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,640.88 : 18,812.04 = 12,220.44 : x
  2. Step 2: Convert to fraction form
    12,640.88/18,812.04 = 12,220.44/x
  3. Step 3: Cross multiply
    12,640.88x = 18,812.04 × 12,220.44
  4. Step 4: Simplify right side
    12,640.88x = 229,891,406.10
  5. Step 5: Solve for x
    x = 229,891,406.10/12,640.88
  6. Step 6: Final answer
    x = 18,186.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.