Home / 20,814.36-28,721.84-11,861.64

Finding the Fourth Proportional to 20,814.36, 28,721.84 and 11,861.64

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Solution

The fourth proportional to 20,814.36, 28,721.84 and 11,861.64 is: 16,367.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,814.36 : 28,721.84 = 11,861.64 : x
  2. Step 2: Convert to fraction form
    20,814.36/28,721.84 = 11,861.64/x
  3. Step 3: Cross multiply
    20,814.36x = 28,721.84 × 11,861.64
  4. Step 4: Simplify right side
    20,814.36x = 340,688,126.22
  5. Step 5: Solve for x
    x = 340,688,126.22/20,814.36
  6. Step 6: Final answer
    x = 16,367.94

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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.