Home / 20,415.09-28,171.87-11,341.04

Finding the Fourth Proportional to 20,415.09, 28,171.87 and 11,341.04

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Solution

The fourth proportional to 20,415.09, 28,171.87 and 11,341.04 is: 15,650.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,415.09 : 28,171.87 = 11,341.04 : x
  2. Step 2: Convert to fraction form
    20,415.09/28,171.87 = 11,341.04/x
  3. Step 3: Cross multiply
    20,415.09x = 28,171.87 × 11,341.04
  4. Step 4: Simplify right side
    20,415.09x = 319,498,304.54
  5. Step 5: Solve for x
    x = 319,498,304.54/20,415.09
  6. Step 6: Final answer
    x = 15,650.11

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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.