Home / 21,620.26-29,835.92-12,188.82

Finding the Fourth Proportional to 21,620.26, 29,835.92 and 12,188.82

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Solution

The fourth proportional to 21,620.26, 29,835.92 and 12,188.82 is: 16,820.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,620.26 : 29,835.92 = 12,188.82 : x
  2. Step 2: Convert to fraction form
    21,620.26/29,835.92 = 12,188.82/x
  3. Step 3: Cross multiply
    21,620.26x = 29,835.92 × 12,188.82
  4. Step 4: Simplify right side
    21,620.26x = 363,664,597.47
  5. Step 5: Solve for x
    x = 363,664,597.47/21,620.26
  6. Step 6: Final answer
    x = 16,820.55

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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.