Home / 20,499.53-28,270.53-13,429.85

Finding the Fourth Proportional to 20,499.53, 28,270.53 and 13,429.85

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Solution

The fourth proportional to 20,499.53, 28,270.53 and 13,429.85 is: 18,520.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,499.53 : 28,270.53 = 13,429.85 : x
  2. Step 2: Convert to fraction form
    20,499.53/28,270.53 = 13,429.85/x
  3. Step 3: Cross multiply
    20,499.53x = 28,270.53 × 13,429.85
  4. Step 4: Simplify right side
    20,499.53x = 379,668,835.97
  5. Step 5: Solve for x
    x = 379,668,835.97/20,499.53
  6. Step 6: Final answer
    x = 18,520.86

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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.