Home / 21,620.41-29,837.53-12,189.58

Finding the Fourth Proportional to 21,620.41, 29,837.53 and 12,189.58

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Solution

The fourth proportional to 21,620.41, 29,837.53 and 12,189.58 is: 16,822.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,620.41 : 29,837.53 = 12,189.58 : x
  2. Step 2: Convert to fraction form
    21,620.41/29,837.53 = 12,189.58/x
  3. Step 3: Cross multiply
    21,620.41x = 29,837.53 × 12,189.58
  4. Step 4: Simplify right side
    21,620.41x = 363,706,809.75
  5. Step 5: Solve for x
    x = 363,706,809.75/21,620.41
  6. Step 6: Final answer
    x = 16,822.39

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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.