Home / 21,179.19-31,728.69-14,137.98

Finding the Fourth Proportional to 21,179.19, 31,728.69 and 14,137.98

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Solution

The fourth proportional to 21,179.19, 31,728.69 and 14,137.98 is: 21,180.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,179.19 : 31,728.69 = 14,137.98 : x
  2. Step 2: Convert to fraction form
    21,179.19/31,728.69 = 14,137.98/x
  3. Step 3: Cross multiply
    21,179.19x = 31,728.69 × 14,137.98
  4. Step 4: Simplify right side
    21,179.19x = 448,579,584.65
  5. Step 5: Solve for x
    x = 448,579,584.65/21,179.19
  6. Step 6: Final answer
    x = 21,180.20

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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.