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Finding the Fourth Proportional to 12,608.68, 18,910.58 and 4,815.64

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Solution

The fourth proportional to 12,608.68, 18,910.58 and 4,815.64 is: 7,222.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,608.68 : 18,910.58 = 4,815.64 : x
  2. Step 2: Convert to fraction form
    12,608.68/18,910.58 = 4,815.64/x
  3. Step 3: Cross multiply
    12,608.68x = 18,910.58 × 4,815.64
  4. Step 4: Simplify right side
    12,608.68x = 91,066,545.47
  5. Step 5: Solve for x
    x = 91,066,545.47/12,608.68
  6. Step 6: Final answer
    x = 7,222.53

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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.