Home / 20,635.99-28,477.78-11,685.24

Finding the Fourth Proportional to 20,635.99, 28,477.78 and 11,685.24

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Solution

The fourth proportional to 20,635.99, 28,477.78 and 11,685.24 is: 16,125.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,635.99 : 28,477.78 = 11,685.24 : x
  2. Step 2: Convert to fraction form
    20,635.99/28,477.78 = 11,685.24/x
  3. Step 3: Cross multiply
    20,635.99x = 28,477.78 × 11,685.24
  4. Step 4: Simplify right side
    20,635.99x = 332,769,704.80
  5. Step 5: Solve for x
    x = 332,769,704.80/20,635.99
  6. Step 6: Final answer
    x = 16,125.69

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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.