Home / 21,138.40-29,170.98-11,706.96

Finding the Fourth Proportional to 21,138.40, 29,170.98 and 11,706.96

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Solution

The fourth proportional to 21,138.40, 29,170.98 and 11,706.96 is: 16,155.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,138.40 : 29,170.98 = 11,706.96 : x
  2. Step 2: Convert to fraction form
    21,138.40/29,170.98 = 11,706.96/x
  3. Step 3: Cross multiply
    21,138.40x = 29,170.98 × 11,706.96
  4. Step 4: Simplify right side
    21,138.40x = 341,503,496.02
  5. Step 5: Solve for x
    x = 341,503,496.02/21,138.40
  6. Step 6: Final answer
    x = 16,155.60

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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.