Home / 20,389.07-28,136.84-11,436.61

Finding the Fourth Proportional to 20,389.07, 28,136.84 and 11,436.61

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Solution

The fourth proportional to 20,389.07, 28,136.84 and 11,436.61 is: 15,782.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,389.07 : 28,136.84 = 11,436.61 : x
  2. Step 2: Convert to fraction form
    20,389.07/28,136.84 = 11,436.61/x
  3. Step 3: Cross multiply
    20,389.07x = 28,136.84 × 11,436.61
  4. Step 4: Simplify right side
    20,389.07x = 321,789,896.37
  5. Step 5: Solve for x
    x = 321,789,896.37/20,389.07
  6. Step 6: Final answer
    x = 15,782.47

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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.