Home / 20,738.82-28,390.61-20,590.59

Finding the Fourth Proportional to 20,738.82, 28,390.61 and 20,590.59

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Solution

The fourth proportional to 20,738.82, 28,390.61 and 20,590.59 is: 28,187.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,738.82 : 28,390.61 = 20,590.59 : x
  2. Step 2: Convert to fraction form
    20,738.82/28,390.61 = 20,590.59/x
  3. Step 3: Cross multiply
    20,738.82x = 28,390.61 × 20,590.59
  4. Step 4: Simplify right side
    20,738.82x = 584,579,307.41
  5. Step 5: Solve for x
    x = 584,579,307.41/20,738.82
  6. Step 6: Final answer
    x = 28,187.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.