Home / 20,579.45-28,400.20-11,626.77

Finding the Fourth Proportional to 20,579.45, 28,400.20 and 11,626.77

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Solution

The fourth proportional to 20,579.45, 28,400.20 and 11,626.77 is: 16,045.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,579.45 : 28,400.20 = 11,626.77 : x
  2. Step 2: Convert to fraction form
    20,579.45/28,400.20 = 11,626.77/x
  3. Step 3: Cross multiply
    20,579.45x = 28,400.20 × 11,626.77
  4. Step 4: Simplify right side
    20,579.45x = 330,202,736.19
  5. Step 5: Solve for x
    x = 330,202,736.19/20,579.45
  6. Step 6: Final answer
    x = 16,045.26

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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.