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Finding the Fourth Proportional to 12,478.10, 18,707.79 and 7,546.73

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Solution

The fourth proportional to 12,478.10, 18,707.79 and 7,546.73 is: 11,314.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,478.10 : 18,707.79 = 7,546.73 : x
  2. Step 2: Convert to fraction form
    12,478.10/18,707.79 = 7,546.73/x
  3. Step 3: Cross multiply
    12,478.10x = 18,707.79 × 7,546.73
  4. Step 4: Simplify right side
    12,478.10x = 141,182,640.03
  5. Step 5: Solve for x
    x = 141,182,640.03/12,478.10
  6. Step 6: Final answer
    x = 11,314.43

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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.