Home / 28,135.46-38,743.35-20,163.98

Finding the Fourth Proportional to 28,135.46, 38,743.35 and 20,163.98

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Solution

The fourth proportional to 28,135.46, 38,743.35 and 20,163.98 is: 27,766.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,135.46 : 38,743.35 = 20,163.98 : x
  2. Step 2: Convert to fraction form
    28,135.46/38,743.35 = 20,163.98/x
  3. Step 3: Cross multiply
    28,135.46x = 38,743.35 × 20,163.98
  4. Step 4: Simplify right side
    28,135.46x = 781,220,134.53
  5. Step 5: Solve for x
    x = 781,220,134.53/28,135.46
  6. Step 6: Final answer
    x = 27,766.39

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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.