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Finding the Fourth Proportional to 18,630.81, 25,721.15 and 12,351.69

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Solution

The fourth proportional to 18,630.81, 25,721.15 and 12,351.69 is: 17,052.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,630.81 : 25,721.15 = 12,351.69 : x
  2. Step 2: Convert to fraction form
    18,630.81/25,721.15 = 12,351.69/x
  3. Step 3: Cross multiply
    18,630.81x = 25,721.15 × 12,351.69
  4. Step 4: Simplify right side
    18,630.81x = 317,699,609.49
  5. Step 5: Solve for x
    x = 317,699,609.49/18,630.81
  6. Step 6: Final answer
    x = 17,052.38

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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.