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Finding the Fourth Proportional to 12,269.43, 18,380.93 and 7,256.79

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Solution

The fourth proportional to 12,269.43, 18,380.93 and 7,256.79 is: 10,871.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,269.43 : 18,380.93 = 7,256.79 : x
  2. Step 2: Convert to fraction form
    12,269.43/18,380.93 = 7,256.79/x
  3. Step 3: Cross multiply
    12,269.43x = 18,380.93 × 7,256.79
  4. Step 4: Simplify right side
    12,269.43x = 133,386,512.73
  5. Step 5: Solve for x
    x = 133,386,512.73/12,269.43
  6. Step 6: Final answer
    x = 10,871.45

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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.