Home / 20,605.48-28,435.41-11,530.85

Finding the Fourth Proportional to 20,605.48, 28,435.41 and 11,530.85

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Solution

The fourth proportional to 20,605.48, 28,435.41 and 11,530.85 is: 15,912.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,605.48 : 28,435.41 = 11,530.85 : x
  2. Step 2: Convert to fraction form
    20,605.48/28,435.41 = 11,530.85/x
  3. Step 3: Cross multiply
    20,605.48x = 28,435.41 × 11,530.85
  4. Step 4: Simplify right side
    20,605.48x = 327,884,305.22
  5. Step 5: Solve for x
    x = 327,884,305.22/20,605.48
  6. Step 6: Final answer
    x = 15,912.48

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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.