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Finding the Fourth Proportional to 18,607.65, 25,664.36 and 12,942.39

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Solution

The fourth proportional to 18,607.65, 25,664.36 and 12,942.39 is: 17,850.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,607.65 : 25,664.36 = 12,942.39 : x
  2. Step 2: Convert to fraction form
    18,607.65/25,664.36 = 12,942.39/x
  3. Step 3: Cross multiply
    18,607.65x = 25,664.36 × 12,942.39
  4. Step 4: Simplify right side
    18,607.65x = 332,158,156.22
  5. Step 5: Solve for x
    x = 332,158,156.22/18,607.65
  6. Step 6: Final answer
    x = 17,850.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.