Home / 20,584.99-28,408.70-12,521.80

Finding the Fourth Proportional to 20,584.99, 28,408.70 and 12,521.80

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Solution

The fourth proportional to 20,584.99, 28,408.70 and 12,521.80 is: 17,280.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,584.99 : 28,408.70 = 12,521.80 : x
  2. Step 2: Convert to fraction form
    20,584.99/28,408.70 = 12,521.80/x
  3. Step 3: Cross multiply
    20,584.99x = 28,408.70 × 12,521.80
  4. Step 4: Simplify right side
    20,584.99x = 355,728,059.66
  5. Step 5: Solve for x
    x = 355,728,059.66/20,584.99
  6. Step 6: Final answer
    x = 17,280.94

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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.