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Finding the Fourth Proportional to 12,570.27, 18,858 and 3,685.89

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Solution

The fourth proportional to 12,570.27, 18,858 and 3,685.89 is: 5,529.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,570.27 : 18,858 = 3,685.89 : x
  2. Step 2: Convert to fraction form
    12,570.27/18,858 = 3,685.89/x
  3. Step 3: Cross multiply
    12,570.27x = 18,858 × 3,685.89
  4. Step 4: Simplify right side
    12,570.27x = 69,508,513.62
  5. Step 5: Solve for x
    x = 69,508,513.62/12,570.27
  6. Step 6: Final answer
    x = 5,529.60

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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.