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Finding the Fourth Proportional to 12,388.44, 18,554.07 and 7,447.23

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Solution

The fourth proportional to 12,388.44, 18,554.07 and 7,447.23 is: 11,153.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,388.44 : 18,554.07 = 7,447.23 : x
  2. Step 2: Convert to fraction form
    12,388.44/18,554.07 = 7,447.23/x
  3. Step 3: Cross multiply
    12,388.44x = 18,554.07 × 7,447.23
  4. Step 4: Simplify right side
    12,388.44x = 138,176,426.73
  5. Step 5: Solve for x
    x = 138,176,426.73/12,388.44
  6. Step 6: Final answer
    x = 11,153.66

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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.