Home / 20,933.54-28,888.20-11,981

Finding the Fourth Proportional to 20,933.54, 28,888.20 and 11,981

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Solution

The fourth proportional to 20,933.54, 28,888.20 and 11,981 is: 16,533.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,933.54 : 28,888.20 = 11,981 : x
  2. Step 2: Convert to fraction form
    20,933.54/28,888.20 = 11,981/x
  3. Step 3: Cross multiply
    20,933.54x = 28,888.20 × 11,981
  4. Step 4: Simplify right side
    20,933.54x = 346,109,524.20
  5. Step 5: Solve for x
    x = 346,109,524.20/20,933.54
  6. Step 6: Final answer
    x = 16,533.73

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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.