Home / 21,620.56-29,835.97-12,189.13

Finding the Fourth Proportional to 21,620.56, 29,835.97 and 12,189.13

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Solution

The fourth proportional to 21,620.56, 29,835.97 and 12,189.13 is: 16,820.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,620.56 : 29,835.97 = 12,189.13 : x
  2. Step 2: Convert to fraction form
    21,620.56/29,835.97 = 12,189.13/x
  3. Step 3: Cross multiply
    21,620.56x = 29,835.97 × 12,189.13
  4. Step 4: Simplify right side
    21,620.56x = 363,674,517.01
  5. Step 5: Solve for x
    x = 363,674,517.01/21,620.56
  6. Step 6: Final answer
    x = 16,820.77

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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.