Home / 20,859.96-28,785.90-12,481.08

Finding the Fourth Proportional to 20,859.96, 28,785.90 and 12,481.08

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Solution

The fourth proportional to 20,859.96, 28,785.90 and 12,481.08 is: 17,223.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,859.96 : 28,785.90 = 12,481.08 : x
  2. Step 2: Convert to fraction form
    20,859.96/28,785.90 = 12,481.08/x
  3. Step 3: Cross multiply
    20,859.96x = 28,785.90 × 12,481.08
  4. Step 4: Simplify right side
    20,859.96x = 359,279,120.77
  5. Step 5: Solve for x
    x = 359,279,120.77/20,859.96
  6. Step 6: Final answer
    x = 17,223.38

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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.