Home / 20,388.36-28,136.36-11,436.49

Finding the Fourth Proportional to 20,388.36, 28,136.36 and 11,436.49

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Solution

The fourth proportional to 20,388.36, 28,136.36 and 11,436.49 is: 15,782.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,388.36 : 28,136.36 = 11,436.49 : x
  2. Step 2: Convert to fraction form
    20,388.36/28,136.36 = 11,436.49/x
  3. Step 3: Cross multiply
    20,388.36x = 28,136.36 × 11,436.49
  4. Step 4: Simplify right side
    20,388.36x = 321,781,263.54
  5. Step 5: Solve for x
    x = 321,781,263.54/20,388.36
  6. Step 6: Final answer
    x = 15,782.60

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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.