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Finding the Fourth Proportional to 12,665.84, 18,999.03 and 3,900.75

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Solution

The fourth proportional to 12,665.84, 18,999.03 and 3,900.75 is: 5,851.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,665.84 : 18,999.03 = 3,900.75 : x
  2. Step 2: Convert to fraction form
    12,665.84/18,999.03 = 3,900.75/x
  3. Step 3: Cross multiply
    12,665.84x = 18,999.03 × 3,900.75
  4. Step 4: Simplify right side
    12,665.84x = 74,110,466.27
  5. Step 5: Solve for x
    x = 74,110,466.27/12,665.84
  6. Step 6: Final answer
    x = 5,851.21

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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.