Home / 20,651.39-28,499.58-11,698.70

Finding the Fourth Proportional to 20,651.39, 28,499.58 and 11,698.70

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Solution

The fourth proportional to 20,651.39, 28,499.58 and 11,698.70 is: 16,144.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,651.39 : 28,499.58 = 11,698.70 : x
  2. Step 2: Convert to fraction form
    20,651.39/28,499.58 = 11,698.70/x
  3. Step 3: Cross multiply
    20,651.39x = 28,499.58 × 11,698.70
  4. Step 4: Simplify right side
    20,651.39x = 333,407,894.05
  5. Step 5: Solve for x
    x = 333,407,894.05/20,651.39
  6. Step 6: Final answer
    x = 16,144.58

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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.