Home / 28,421.82-39,175.11-18,986.94

Finding the Fourth Proportional to 28,421.82, 39,175.11 and 18,986.94

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Solution

The fourth proportional to 28,421.82, 39,175.11 and 18,986.94 is: 26,170.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,421.82 : 39,175.11 = 18,986.94 : x
  2. Step 2: Convert to fraction form
    28,421.82/39,175.11 = 18,986.94/x
  3. Step 3: Cross multiply
    28,421.82x = 39,175.11 × 18,986.94
  4. Step 4: Simplify right side
    28,421.82x = 743,815,463.06
  5. Step 5: Solve for x
    x = 743,815,463.06/28,421.82
  6. Step 6: Final answer
    x = 26,170.58

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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.