Home / 20,382.33-28,127.07-11,430.39

Finding the Fourth Proportional to 20,382.33, 28,127.07 and 11,430.39

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Solution

The fourth proportional to 20,382.33, 28,127.07 and 11,430.39 is: 15,773.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,382.33 : 28,127.07 = 11,430.39 : x
  2. Step 2: Convert to fraction form
    20,382.33/28,127.07 = 11,430.39/x
  3. Step 3: Cross multiply
    20,382.33x = 28,127.07 × 11,430.39
  4. Step 4: Simplify right side
    20,382.33x = 321,503,379.66
  5. Step 5: Solve for x
    x = 321,503,379.66/20,382.33
  6. Step 6: Final answer
    x = 15,773.63

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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.