Home / 21,142.12-29,176.32-12,757

Finding the Fourth Proportional to 21,142.12, 29,176.32 and 12,757

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Solution

The fourth proportional to 21,142.12, 29,176.32 and 12,757 is: 17,604.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,142.12 : 29,176.32 = 12,757 : x
  2. Step 2: Convert to fraction form
    21,142.12/29,176.32 = 12,757/x
  3. Step 3: Cross multiply
    21,142.12x = 29,176.32 × 12,757
  4. Step 4: Simplify right side
    21,142.12x = 372,202,314.24
  5. Step 5: Solve for x
    x = 372,202,314.24/21,142.12
  6. Step 6: Final answer
    x = 17,604.78

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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.