Home / 20,600.87-28,429.04-11,169.36

Finding the Fourth Proportional to 20,600.87, 28,429.04 and 11,169.36

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Solution

The fourth proportional to 20,600.87, 28,429.04 and 11,169.36 is: 15,413.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,600.87 : 28,429.04 = 11,169.36 : x
  2. Step 2: Convert to fraction form
    20,600.87/28,429.04 = 11,169.36/x
  3. Step 3: Cross multiply
    20,600.87x = 28,429.04 × 11,169.36
  4. Step 4: Simplify right side
    20,600.87x = 317,534,210.14
  5. Step 5: Solve for x
    x = 317,534,210.14/20,600.87
  6. Step 6: Final answer
    x = 15,413.63

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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.