Home / 20,388.50-28,137.03-11,436.83

Finding the Fourth Proportional to 20,388.50, 28,137.03 and 11,436.83

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Solution

The fourth proportional to 20,388.50, 28,137.03 and 11,436.83 is: 15,783.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,388.50 : 28,137.03 = 11,436.83 : x
  2. Step 2: Convert to fraction form
    20,388.50/28,137.03 = 11,436.83/x
  3. Step 3: Cross multiply
    20,388.50x = 28,137.03 × 11,436.83
  4. Step 4: Simplify right side
    20,388.50x = 321,798,428.81
  5. Step 5: Solve for x
    x = 321,798,428.81/20,388.50
  6. Step 6: Final answer
    x = 15,783.33

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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.