Home / 21,299.12-29,391.68-11,868.56

Finding the Fourth Proportional to 21,299.12, 29,391.68 and 11,868.56

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Solution

The fourth proportional to 21,299.12, 29,391.68 and 11,868.56 is: 16,378.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,299.12 : 29,391.68 = 11,868.56 : x
  2. Step 2: Convert to fraction form
    21,299.12/29,391.68 = 11,868.56/x
  3. Step 3: Cross multiply
    21,299.12x = 29,391.68 × 11,868.56
  4. Step 4: Simplify right side
    21,299.12x = 348,836,917.58
  5. Step 5: Solve for x
    x = 348,836,917.58/21,299.12
  6. Step 6: Final answer
    x = 16,378.00

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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.