Home / 11,921.54-16,436.93-7,933.91

Finding the Fourth Proportional to 11,921.54, 16,436.93 and 7,933.91

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Solution

The fourth proportional to 11,921.54, 16,436.93 and 7,933.91 is: 10,938.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,921.54 : 16,436.93 = 7,933.91 : x
  2. Step 2: Convert to fraction form
    11,921.54/16,436.93 = 7,933.91/x
  3. Step 3: Cross multiply
    11,921.54x = 16,436.93 × 7,933.91
  4. Step 4: Simplify right side
    11,921.54x = 130,409,001.44
  5. Step 5: Solve for x
    x = 130,409,001.44/11,921.54
  6. Step 6: Final answer
    x = 10,938.94

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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.