Home / 27,179.88-40,785.10-21,240.12

Finding the Fourth Proportional to 27,179.88, 40,785.10 and 21,240.12

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Solution

The fourth proportional to 27,179.88, 40,785.10 and 21,240.12 is: 31,872.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,179.88 : 40,785.10 = 21,240.12 : x
  2. Step 2: Convert to fraction form
    27,179.88/40,785.10 = 21,240.12/x
  3. Step 3: Cross multiply
    27,179.88x = 40,785.10 × 21,240.12
  4. Step 4: Simplify right side
    27,179.88x = 866,280,418.21
  5. Step 5: Solve for x
    x = 866,280,418.21/27,179.88
  6. Step 6: Final answer
    x = 31,872.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.