Home / 21,140.42-29,179.03-12,193.30

Finding the Fourth Proportional to 21,140.42, 29,179.03 and 12,193.30

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Solution

The fourth proportional to 21,140.42, 29,179.03 and 12,193.30 is: 16,829.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.42 : 29,179.03 = 12,193.30 : x
  2. Step 2: Convert to fraction form
    21,140.42/29,179.03 = 12,193.30/x
  3. Step 3: Cross multiply
    21,140.42x = 29,179.03 × 12,193.30
  4. Step 4: Simplify right side
    21,140.42x = 355,788,563.07
  5. Step 5: Solve for x
    x = 355,788,563.07/21,140.42
  6. Step 6: Final answer
    x = 16,829.78

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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.