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Finding the Fourth Proportional to 12,469.70, 18,707.15 and 4,152.30

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Solution

The fourth proportional to 12,469.70, 18,707.15 and 4,152.30 is: 6,229.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,469.70 : 18,707.15 = 4,152.30 : x
  2. Step 2: Convert to fraction form
    12,469.70/18,707.15 = 4,152.30/x
  3. Step 3: Cross multiply
    12,469.70x = 18,707.15 × 4,152.30
  4. Step 4: Simplify right side
    12,469.70x = 77,677,698.95
  5. Step 5: Solve for x
    x = 77,677,698.95/12,469.70
  6. Step 6: Final answer
    x = 6,229.32

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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.