Home / 21,137.90-29,170.28-11,706.46

Finding the Fourth Proportional to 21,137.90, 29,170.28 and 11,706.46

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Solution

The fourth proportional to 21,137.90, 29,170.28 and 11,706.46 is: 16,154.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,137.90 : 29,170.28 = 11,706.46 : x
  2. Step 2: Convert to fraction form
    21,137.90/29,170.28 = 11,706.46/x
  3. Step 3: Cross multiply
    21,137.90x = 29,170.28 × 11,706.46
  4. Step 4: Simplify right side
    21,137.90x = 341,480,716.01
  5. Step 5: Solve for x
    x = 341,480,716.01/21,137.90
  6. Step 6: Final answer
    x = 16,154.90

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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.