Home / 20,609.22-28,440.74-11,177.78

Finding the Fourth Proportional to 20,609.22, 28,440.74 and 11,177.78

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Solution

The fourth proportional to 20,609.22, 28,440.74 and 11,177.78 is: 15,425.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,609.22 : 28,440.74 = 11,177.78 : x
  2. Step 2: Convert to fraction form
    20,609.22/28,440.74 = 11,177.78/x
  3. Step 3: Cross multiply
    20,609.22x = 28,440.74 × 11,177.78
  4. Step 4: Simplify right side
    20,609.22x = 317,904,334.76
  5. Step 5: Solve for x
    x = 317,904,334.76/20,609.22
  6. Step 6: Final answer
    x = 15,425.35

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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.