Home / 20,881.36-28,814.40-11,928.84

Finding the Fourth Proportional to 20,881.36, 28,814.40 and 11,928.84

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Solution

The fourth proportional to 20,881.36, 28,814.40 and 11,928.84 is: 16,460.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,881.36 : 28,814.40 = 11,928.84 : x
  2. Step 2: Convert to fraction form
    20,881.36/28,814.40 = 11,928.84/x
  3. Step 3: Cross multiply
    20,881.36x = 28,814.40 × 11,928.84
  4. Step 4: Simplify right side
    20,881.36x = 343,722,367.30
  5. Step 5: Solve for x
    x = 343,722,367.30/20,881.36
  6. Step 6: Final answer
    x = 16,460.73

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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.