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Finding the Fourth Proportional to 11,351.88, 15,661.32 and 8,374.88

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Solution

The fourth proportional to 11,351.88, 15,661.32 and 8,374.88 is: 11,554.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,351.88 : 15,661.32 = 8,374.88 : x
  2. Step 2: Convert to fraction form
    11,351.88/15,661.32 = 8,374.88/x
  3. Step 3: Cross multiply
    11,351.88x = 15,661.32 × 8,374.88
  4. Step 4: Simplify right side
    11,351.88x = 131,161,675.64
  5. Step 5: Solve for x
    x = 131,161,675.64/11,351.88
  6. Step 6: Final answer
    x = 11,554.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.