Home / 21,638.58-29,861.78-12,207.75

Finding the Fourth Proportional to 21,638.58, 29,861.78 and 12,207.75

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Solution

The fourth proportional to 21,638.58, 29,861.78 and 12,207.75 is: 16,847.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,638.58 : 29,861.78 = 12,207.75 : x
  2. Step 2: Convert to fraction form
    21,638.58/29,861.78 = 12,207.75/x
  3. Step 3: Cross multiply
    21,638.58x = 29,861.78 × 12,207.75
  4. Step 4: Simplify right side
    21,638.58x = 364,545,083.76
  5. Step 5: Solve for x
    x = 364,545,083.76/21,638.58
  6. Step 6: Final answer
    x = 16,847.00

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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.