Home / 20,717.98-28,590.99-11,286.55

Finding the Fourth Proportional to 20,717.98, 28,590.99 and 11,286.55

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Solution

The fourth proportional to 20,717.98, 28,590.99 and 11,286.55 is: 15,575.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,717.98 : 28,590.99 = 11,286.55 : x
  2. Step 2: Convert to fraction form
    20,717.98/28,590.99 = 11,286.55/x
  3. Step 3: Cross multiply
    20,717.98x = 28,590.99 × 11,286.55
  4. Step 4: Simplify right side
    20,717.98x = 322,693,638.18
  5. Step 5: Solve for x
    x = 322,693,638.18/20,717.98
  6. Step 6: Final answer
    x = 15,575.54

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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.