Home / 21,127.62-29,169.88-13,576.86

Finding the Fourth Proportional to 21,127.62, 29,169.88 and 13,576.86

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Solution

The fourth proportional to 21,127.62, 29,169.88 and 13,576.86 is: 18,744.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,127.62 : 29,169.88 = 13,576.86 : x
  2. Step 2: Convert to fraction form
    21,127.62/29,169.88 = 13,576.86/x
  3. Step 3: Cross multiply
    21,127.62x = 29,169.88 × 13,576.86
  4. Step 4: Simplify right side
    21,127.62x = 396,035,376.98
  5. Step 5: Solve for x
    x = 396,035,376.98/21,127.62
  6. Step 6: Final answer
    x = 18,744.91

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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.