Home / 20,645.55-28,490.82-11,214.09

Finding the Fourth Proportional to 20,645.55, 28,490.82 and 11,214.09

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Solution

The fourth proportional to 20,645.55, 28,490.82 and 11,214.09 is: 15,475.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,645.55 : 28,490.82 = 11,214.09 : x
  2. Step 2: Convert to fraction form
    20,645.55/28,490.82 = 11,214.09/x
  3. Step 3: Cross multiply
    20,645.55x = 28,490.82 × 11,214.09
  4. Step 4: Simplify right side
    20,645.55x = 319,498,619.65
  5. Step 5: Solve for x
    x = 319,498,619.65/20,645.55
  6. Step 6: Final answer
    x = 15,475.42

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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.