Home / 21,638.09-29,861.46-12,206.63

Finding the Fourth Proportional to 21,638.09, 29,861.46 and 12,206.63

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Solution

The fourth proportional to 21,638.09, 29,861.46 and 12,206.63 is: 16,845.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,638.09 : 29,861.46 = 12,206.63 : x
  2. Step 2: Convert to fraction form
    21,638.09/29,861.46 = 12,206.63/x
  3. Step 3: Cross multiply
    21,638.09x = 29,861.46 × 12,206.63
  4. Step 4: Simplify right side
    21,638.09x = 364,507,644.17
  5. Step 5: Solve for x
    x = 364,507,644.17/21,638.09
  6. Step 6: Final answer
    x = 16,845.65

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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.