Home / 21,619.58-29,835.06-12,188.12

Finding the Fourth Proportional to 21,619.58, 29,835.06 and 12,188.12

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Solution

The fourth proportional to 21,619.58, 29,835.06 and 12,188.12 is: 16,819.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,619.58 : 29,835.06 = 12,188.12 : x
  2. Step 2: Convert to fraction form
    21,619.58/29,835.06 = 12,188.12/x
  3. Step 3: Cross multiply
    21,619.58x = 29,835.06 × 12,188.12
  4. Step 4: Simplify right side
    21,619.58x = 363,633,291.49
  5. Step 5: Solve for x
    x = 363,633,291.49/21,619.58
  6. Step 6: Final answer
    x = 16,819.63

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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.