Home / 21,167.21-29,202.77-12,211.44

Finding the Fourth Proportional to 21,167.21, 29,202.77 and 12,211.44

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Solution

The fourth proportional to 21,167.21, 29,202.77 and 12,211.44 is: 16,847.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,167.21 : 29,202.77 = 12,211.44 : x
  2. Step 2: Convert to fraction form
    21,167.21/29,202.77 = 12,211.44/x
  3. Step 3: Cross multiply
    21,167.21x = 29,202.77 × 12,211.44
  4. Step 4: Simplify right side
    21,167.21x = 356,607,812.63
  5. Step 5: Solve for x
    x = 356,607,812.63/21,167.21
  6. Step 6: Final answer
    x = 16,847.18

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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.