Home / 20,415.80-28,174.49-11,464.89

Finding the Fourth Proportional to 20,415.80, 28,174.49 and 11,464.89

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Solution

The fourth proportional to 20,415.80, 28,174.49 and 11,464.89 is: 15,821.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,415.80 : 28,174.49 = 11,464.89 : x
  2. Step 2: Convert to fraction form
    20,415.80/28,174.49 = 11,464.89/x
  3. Step 3: Cross multiply
    20,415.80x = 28,174.49 × 11,464.89
  4. Step 4: Simplify right side
    20,415.80x = 323,017,371.33
  5. Step 5: Solve for x
    x = 323,017,371.33/20,415.80
  6. Step 6: Final answer
    x = 15,821.93

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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.