Home / 21,160.60-29,202.56-11,728.56

Finding the Fourth Proportional to 21,160.60, 29,202.56 and 11,728.56

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Solution

The fourth proportional to 21,160.60, 29,202.56 and 11,728.56 is: 16,185.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,160.60 : 29,202.56 = 11,728.56 : x
  2. Step 2: Convert to fraction form
    21,160.60/29,202.56 = 11,728.56/x
  3. Step 3: Cross multiply
    21,160.60x = 29,202.56 × 11,728.56
  4. Step 4: Simplify right side
    21,160.60x = 342,503,977.11
  5. Step 5: Solve for x
    x = 342,503,977.11/21,160.60
  6. Step 6: Final answer
    x = 16,185.93

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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.