Home / 15,786.16-21,786.44-11,800.36

Finding the Fourth Proportional to 15,786.16, 21,786.44 and 11,800.36

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Solution

The fourth proportional to 15,786.16, 21,786.44 and 11,800.36 is: 16,285.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,786.16 : 21,786.44 = 11,800.36 : x
  2. Step 2: Convert to fraction form
    15,786.16/21,786.44 = 11,800.36/x
  3. Step 3: Cross multiply
    15,786.16x = 21,786.44 × 11,800.36
  4. Step 4: Simplify right side
    15,786.16x = 257,087,835.12
  5. Step 5: Solve for x
    x = 257,087,835.12/15,786.16
  6. Step 6: Final answer
    x = 16,285.65

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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.