Home / 20,389.73-28,137.24-11,436.66

Finding the Fourth Proportional to 20,389.73, 28,137.24 and 11,436.66

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Solution

The fourth proportional to 20,389.73, 28,137.24 and 11,436.66 is: 15,782.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,389.73 : 28,137.24 = 11,436.66 : x
  2. Step 2: Convert to fraction form
    20,389.73/28,137.24 = 11,436.66/x
  3. Step 3: Cross multiply
    20,389.73x = 28,137.24 × 11,436.66
  4. Step 4: Simplify right side
    20,389.73x = 321,796,047.22
  5. Step 5: Solve for x
    x = 321,796,047.22/20,389.73
  6. Step 6: Final answer
    x = 15,782.27

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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.