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Finding the Fourth Proportional to 10,878.75, 15,019.92 and 8,356.37

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Solution

The fourth proportional to 10,878.75, 15,019.92 and 8,356.37 is: 11,537.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,878.75 : 15,019.92 = 8,356.37 : x
  2. Step 2: Convert to fraction form
    10,878.75/15,019.92 = 8,356.37/x
  3. Step 3: Cross multiply
    10,878.75x = 15,019.92 × 8,356.37
  4. Step 4: Simplify right side
    10,878.75x = 125,511,933.79
  5. Step 5: Solve for x
    x = 125,511,933.79/10,878.75
  6. Step 6: Final answer
    x = 11,537.35

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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.