Home / 20,868.96-31,321.80-11,015.31

Finding the Fourth Proportional to 20,868.96, 31,321.80 and 11,015.31

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Solution

The fourth proportional to 20,868.96, 31,321.80 and 11,015.31 is: 16,532.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,868.96 : 31,321.80 = 11,015.31 : x
  2. Step 2: Convert to fraction form
    20,868.96/31,321.80 = 11,015.31/x
  3. Step 3: Cross multiply
    20,868.96x = 31,321.80 × 11,015.31
  4. Step 4: Simplify right side
    20,868.96x = 345,019,336.76
  5. Step 5: Solve for x
    x = 345,019,336.76/20,868.96
  6. Step 6: Final answer
    x = 16,532.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.