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Finding the Fourth Proportional to 12,608.04, 18,911.90 and 4,815.02

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Solution

The fourth proportional to 12,608.04, 18,911.90 and 4,815.02 is: 7,222.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,608.04 : 18,911.90 = 4,815.02 : x
  2. Step 2: Convert to fraction form
    12,608.04/18,911.90 = 4,815.02/x
  3. Step 3: Cross multiply
    12,608.04x = 18,911.90 × 4,815.02
  4. Step 4: Simplify right side
    12,608.04x = 91,061,176.74
  5. Step 5: Solve for x
    x = 91,061,176.74/12,608.04
  6. Step 6: Final answer
    x = 7,222.47

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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.