Home / 20,868.16-31,309.24-6,828.84

Finding the Fourth Proportional to 20,868.16, 31,309.24 and 6,828.84

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Solution

The fourth proportional to 20,868.16, 31,309.24 and 6,828.84 is: 10,245.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,868.16 : 31,309.24 = 6,828.84 : x
  2. Step 2: Convert to fraction form
    20,868.16/31,309.24 = 6,828.84/x
  3. Step 3: Cross multiply
    20,868.16x = 31,309.24 × 6,828.84
  4. Step 4: Simplify right side
    20,868.16x = 213,805,790.48
  5. Step 5: Solve for x
    x = 213,805,790.48/20,868.16
  6. Step 6: Final answer
    x = 10,245.55

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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.