Home / 20,814.30-28,721.79-11,863.80

Finding the Fourth Proportional to 20,814.30, 28,721.79 and 11,863.80

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Solution

The fourth proportional to 20,814.30, 28,721.79 and 11,863.80 is: 16,370.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,814.30 : 28,721.79 = 11,863.80 : x
  2. Step 2: Convert to fraction form
    20,814.30/28,721.79 = 11,863.80/x
  3. Step 3: Cross multiply
    20,814.30x = 28,721.79 × 11,863.80
  4. Step 4: Simplify right side
    20,814.30x = 340,749,572.20
  5. Step 5: Solve for x
    x = 340,749,572.20/20,814.30
  6. Step 6: Final answer
    x = 16,370.94

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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.