Home / 21,138.01-29,171.33-11,706.58

Finding the Fourth Proportional to 21,138.01, 29,171.33 and 11,706.58

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Solution

The fourth proportional to 21,138.01, 29,171.33 and 11,706.58 is: 16,155.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,138.01 : 29,171.33 = 11,706.58 : x
  2. Step 2: Convert to fraction form
    21,138.01/29,171.33 = 11,706.58/x
  3. Step 3: Cross multiply
    21,138.01x = 29,171.33 × 11,706.58
  4. Step 4: Simplify right side
    21,138.01x = 341,496,508.35
  5. Step 5: Solve for x
    x = 341,496,508.35/21,138.01
  6. Step 6: Final answer
    x = 16,155.57

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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.