Home / 20,675.70-28,530.09-11,721.42

Finding the Fourth Proportional to 20,675.70, 28,530.09 and 11,721.42

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Solution

The fourth proportional to 20,675.70, 28,530.09 and 11,721.42 is: 16,174.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,675.70 : 28,530.09 = 11,721.42 : x
  2. Step 2: Convert to fraction form
    20,675.70/28,530.09 = 11,721.42/x
  3. Step 3: Cross multiply
    20,675.70x = 28,530.09 × 11,721.42
  4. Step 4: Simplify right side
    20,675.70x = 334,413,167.53
  5. Step 5: Solve for x
    x = 334,413,167.53/20,675.70
  6. Step 6: Final answer
    x = 16,174.21

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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.