Home / 20,868.12-28,797.84-11,436.66

Finding the Fourth Proportional to 20,868.12, 28,797.84 and 11,436.66

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Solution

The fourth proportional to 20,868.12, 28,797.84 and 11,436.66 is: 15,782.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,868.12 : 28,797.84 = 11,436.66 : x
  2. Step 2: Convert to fraction form
    20,868.12/28,797.84 = 11,436.66/x
  3. Step 3: Cross multiply
    20,868.12x = 28,797.84 × 11,436.66
  4. Step 4: Simplify right side
    20,868.12x = 329,351,104.81
  5. Step 5: Solve for x
    x = 329,351,104.81/20,868.12
  6. Step 6: Final answer
    x = 15,782.50

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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.