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Finding the Fourth Proportional to 12,480.54, 18,705.83 and 7,204.55

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Solution

The fourth proportional to 12,480.54, 18,705.83 and 7,204.55 is: 10,798.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,480.54 : 18,705.83 = 7,204.55 : x
  2. Step 2: Convert to fraction form
    12,480.54/18,705.83 = 7,204.55/x
  3. Step 3: Cross multiply
    12,480.54x = 18,705.83 × 7,204.55
  4. Step 4: Simplify right side
    12,480.54x = 134,766,957.97
  5. Step 5: Solve for x
    x = 134,766,957.97/12,480.54
  6. Step 6: Final answer
    x = 10,798.17

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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.