Home / 21,170.85-29,219.58-12,217.11

Finding the Fourth Proportional to 21,170.85, 29,219.58 and 12,217.11

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Solution

The fourth proportional to 21,170.85, 29,219.58 and 12,217.11 is: 16,861.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,170.85 : 29,219.58 = 12,217.11 : x
  2. Step 2: Convert to fraction form
    21,170.85/29,219.58 = 12,217.11/x
  3. Step 3: Cross multiply
    21,170.85x = 29,219.58 × 12,217.11
  4. Step 4: Simplify right side
    21,170.85x = 356,978,823.01
  5. Step 5: Solve for x
    x = 356,978,823.01/21,170.85
  6. Step 6: Final answer
    x = 16,861.81

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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.