Home / 20,392.40-28,142.52-11,439.44

Finding the Fourth Proportional to 20,392.40, 28,142.52 and 11,439.44

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Solution

The fourth proportional to 20,392.40, 28,142.52 and 11,439.44 is: 15,786.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,392.40 : 28,142.52 = 11,439.44 : x
  2. Step 2: Convert to fraction form
    20,392.40/28,142.52 = 11,439.44/x
  3. Step 3: Cross multiply
    20,392.40x = 28,142.52 × 11,439.44
  4. Step 4: Simplify right side
    20,392.40x = 321,934,668.99
  5. Step 5: Solve for x
    x = 321,934,668.99/20,392.40
  6. Step 6: Final answer
    x = 15,786.99

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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.