Home / 21,159.09-29,199.42-12,206.43

Finding the Fourth Proportional to 21,159.09, 29,199.42 and 12,206.43

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Solution

The fourth proportional to 21,159.09, 29,199.42 and 12,206.43 is: 16,844.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,159.09 : 29,199.42 = 12,206.43 : x
  2. Step 2: Convert to fraction form
    21,159.09/29,199.42 = 12,206.43/x
  3. Step 3: Cross multiply
    21,159.09x = 29,199.42 × 12,206.43
  4. Step 4: Simplify right side
    21,159.09x = 356,420,676.27
  5. Step 5: Solve for x
    x = 356,420,676.27/21,159.09
  6. Step 6: Final answer
    x = 16,844.80

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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.