Home / 21,153.54-29,195-12,199.30

Finding the Fourth Proportional to 21,153.54, 29,195 and 12,199.30

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Solution

The fourth proportional to 21,153.54, 29,195 and 12,199.30 is: 16,836.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,153.54 : 29,195 = 12,199.30 : x
  2. Step 2: Convert to fraction form
    21,153.54/29,195 = 12,199.30/x
  3. Step 3: Cross multiply
    21,153.54x = 29,195 × 12,199.30
  4. Step 4: Simplify right side
    21,153.54x = 356,158,563.50
  5. Step 5: Solve for x
    x = 356,158,563.50/21,153.54
  6. Step 6: Final answer
    x = 16,836.83

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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.