Home / 20,305.32-28,021.25-11,352.80

Finding the Fourth Proportional to 20,305.32, 28,021.25 and 11,352.80

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Solution

The fourth proportional to 20,305.32, 28,021.25 and 11,352.80 is: 15,666.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,305.32 : 28,021.25 = 11,352.80 : x
  2. Step 2: Convert to fraction form
    20,305.32/28,021.25 = 11,352.80/x
  3. Step 3: Cross multiply
    20,305.32x = 28,021.25 × 11,352.80
  4. Step 4: Simplify right side
    20,305.32x = 318,119,450.13
  5. Step 5: Solve for x
    x = 318,119,450.13/20,305.32
  6. Step 6: Final answer
    x = 15,666.80

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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.