Home / 20,381.55-28,125.32-11,427.27

Finding the Fourth Proportional to 20,381.55, 28,125.32 and 11,427.27

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Solution

The fourth proportional to 20,381.55, 28,125.32 and 11,427.27 is: 15,768.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,381.55 : 28,125.32 = 11,427.27 : x
  2. Step 2: Convert to fraction form
    20,381.55/28,125.32 = 11,427.27/x
  3. Step 3: Cross multiply
    20,381.55x = 28,125.32 × 11,427.27
  4. Step 4: Simplify right side
    20,381.55x = 321,395,568.34
  5. Step 5: Solve for x
    x = 321,395,568.34/20,381.55
  6. Step 6: Final answer
    x = 15,768.95

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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.