Home / 21,728.79-29,986.16-14,179.95

Finding the Fourth Proportional to 21,728.79, 29,986.16 and 14,179.95

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Solution

The fourth proportional to 21,728.79, 29,986.16 and 14,179.95 is: 19,568.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,728.79 : 29,986.16 = 14,179.95 : x
  2. Step 2: Convert to fraction form
    21,728.79/29,986.16 = 14,179.95/x
  3. Step 3: Cross multiply
    21,728.79x = 29,986.16 × 14,179.95
  4. Step 4: Simplify right side
    21,728.79x = 425,202,178.59
  5. Step 5: Solve for x
    x = 425,202,178.59/21,728.79
  6. Step 6: Final answer
    x = 19,568.61

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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.