Home / 20,310.09-28,028.10-11,235.30

Finding the Fourth Proportional to 20,310.09, 28,028.10 and 11,235.30

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Solution

The fourth proportional to 20,310.09, 28,028.10 and 11,235.30 is: 15,504.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,310.09 : 28,028.10 = 11,235.30 : x
  2. Step 2: Convert to fraction form
    20,310.09/28,028.10 = 11,235.30/x
  3. Step 3: Cross multiply
    20,310.09x = 28,028.10 × 11,235.30
  4. Step 4: Simplify right side
    20,310.09x = 314,904,111.93
  5. Step 5: Solve for x
    x = 314,904,111.93/20,310.09
  6. Step 6: Final answer
    x = 15,504.81

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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.