Home / 21,138.42-29,169.90-11,706.36

Finding the Fourth Proportional to 21,138.42, 29,169.90 and 11,706.36

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Solution

The fourth proportional to 21,138.42, 29,169.90 and 11,706.36 is: 16,154.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,138.42 : 29,169.90 = 11,706.36 : x
  2. Step 2: Convert to fraction form
    21,138.42/29,169.90 = 11,706.36/x
  3. Step 3: Cross multiply
    21,138.42x = 29,169.90 × 11,706.36
  4. Step 4: Simplify right side
    21,138.42x = 341,473,350.56
  5. Step 5: Solve for x
    x = 341,473,350.56/21,138.42
  6. Step 6: Final answer
    x = 16,154.16

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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.