Home / 21,238.98-29,302.49-13,169.73

Finding the Fourth Proportional to 21,238.98, 29,302.49 and 13,169.73

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Solution

The fourth proportional to 21,238.98, 29,302.49 and 13,169.73 is: 18,169.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,238.98 : 29,302.49 = 13,169.73 : x
  2. Step 2: Convert to fraction form
    21,238.98/29,302.49 = 13,169.73/x
  3. Step 3: Cross multiply
    21,238.98x = 29,302.49 × 13,169.73
  4. Step 4: Simplify right side
    21,238.98x = 385,905,790.62
  5. Step 5: Solve for x
    x = 385,905,790.62/21,238.98
  6. Step 6: Final answer
    x = 18,169.70

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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.