Home / 11,521.80-15,928.36-11,416.50

Finding the Fourth Proportional to 11,521.80, 15,928.36 and 11,416.50

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Solution

The fourth proportional to 11,521.80, 15,928.36 and 11,416.50 is: 15,782.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,521.80 : 15,928.36 = 11,416.50 : x
  2. Step 2: Convert to fraction form
    11,521.80/15,928.36 = 11,416.50/x
  3. Step 3: Cross multiply
    11,521.80x = 15,928.36 × 11,416.50
  4. Step 4: Simplify right side
    11,521.80x = 181,846,121.94
  5. Step 5: Solve for x
    x = 181,846,121.94/11,521.80
  6. Step 6: Final answer
    x = 15,782.79

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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.