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Finding the Fourth Proportional to 12,609, 18,920.79 and 5,683.50

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Solution

The fourth proportional to 12,609, 18,920.79 and 5,683.50 is: 8,528.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,609 : 18,920.79 = 5,683.50 : x
  2. Step 2: Convert to fraction form
    12,609/18,920.79 = 5,683.50/x
  3. Step 3: Cross multiply
    12,609x = 18,920.79 × 5,683.50
  4. Step 4: Simplify right side
    12,609x = 107,536,309.97
  5. Step 5: Solve for x
    x = 107,536,309.97/12,609
  6. Step 6: Final answer
    x = 8,528.54

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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.