Home / 21,638.46-29,861.12-12,684.18

Finding the Fourth Proportional to 21,638.46, 29,861.12 and 12,684.18

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Solution

The fourth proportional to 21,638.46, 29,861.12 and 12,684.18 is: 17,504.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,638.46 : 29,861.12 = 12,684.18 : x
  2. Step 2: Convert to fraction form
    21,638.46/29,861.12 = 12,684.18/x
  3. Step 3: Cross multiply
    21,638.46x = 29,861.12 × 12,684.18
  4. Step 4: Simplify right side
    21,638.46x = 378,763,821.08
  5. Step 5: Solve for x
    x = 378,763,821.08/21,638.46
  6. Step 6: Final answer
    x = 17,504.19

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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.