Home / 21,728.54-29,985.82-14,179.70

Finding the Fourth Proportional to 21,728.54, 29,985.82 and 14,179.70

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Solution

The fourth proportional to 21,728.54, 29,985.82 and 14,179.70 is: 19,568.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,728.54 : 29,985.82 = 14,179.70 : x
  2. Step 2: Convert to fraction form
    21,728.54/29,985.82 = 14,179.70/x
  3. Step 3: Cross multiply
    21,728.54x = 29,985.82 × 14,179.70
  4. Step 4: Simplify right side
    21,728.54x = 425,189,931.85
  5. Step 5: Solve for x
    x = 425,189,931.85/21,728.54
  6. Step 6: Final answer
    x = 19,568.27

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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.