Home / 21,146.99-29,181.69-11,585.11

Finding the Fourth Proportional to 21,146.99, 29,181.69 and 11,585.11

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Solution

The fourth proportional to 21,146.99, 29,181.69 and 11,585.11 is: 15,986.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,146.99 : 29,181.69 = 11,585.11 : x
  2. Step 2: Convert to fraction form
    21,146.99/29,181.69 = 11,585.11/x
  3. Step 3: Cross multiply
    21,146.99x = 29,181.69 × 11,585.11
  4. Step 4: Simplify right side
    21,146.99x = 338,072,942.73
  5. Step 5: Solve for x
    x = 338,072,942.73/21,146.99
  6. Step 6: Final answer
    x = 15,986.81

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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.