Home / 20,879.04-28,812.90-11,447.58

Finding the Fourth Proportional to 20,879.04, 28,812.90 and 11,447.58

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Solution

The fourth proportional to 20,879.04, 28,812.90 and 11,447.58 is: 15,797.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,879.04 : 28,812.90 = 11,447.58 : x
  2. Step 2: Convert to fraction form
    20,879.04/28,812.90 = 11,447.58/x
  3. Step 3: Cross multiply
    20,879.04x = 28,812.90 × 11,447.58
  4. Step 4: Simplify right side
    20,879.04x = 329,837,977.78
  5. Step 5: Solve for x
    x = 329,837,977.78/20,879.04
  6. Step 6: Final answer
    x = 15,797.56

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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.