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Finding the Fourth Proportional to 12,469.79, 18,707.74 and 4,149.79

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Solution

The fourth proportional to 12,469.79, 18,707.74 and 4,149.79 is: 6,225.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,469.79 : 18,707.74 = 4,149.79 : x
  2. Step 2: Convert to fraction form
    12,469.79/18,707.74 = 4,149.79/x
  3. Step 3: Cross multiply
    12,469.79x = 18,707.74 × 4,149.79
  4. Step 4: Simplify right side
    12,469.79x = 77,633,135.23
  5. Step 5: Solve for x
    x = 77,633,135.23/12,469.79
  6. Step 6: Final answer
    x = 6,225.70

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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.