Home / 20,128.29-30,200.97-10,765.88

Finding the Fourth Proportional to 20,128.29, 30,200.97 and 10,765.88

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Solution

The fourth proportional to 20,128.29, 30,200.97 and 10,765.88 is: 16,153.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128.29 : 30,200.97 = 10,765.88 : x
  2. Step 2: Convert to fraction form
    20,128.29/30,200.97 = 10,765.88/x
  3. Step 3: Cross multiply
    20,128.29x = 30,200.97 × 10,765.88
  4. Step 4: Simplify right side
    20,128.29x = 325,140,018.90
  5. Step 5: Solve for x
    x = 325,140,018.90/20,128.29
  6. Step 6: Final answer
    x = 16,153.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.