Home / 21,264.75-31,886.40-12,382.95

Finding the Fourth Proportional to 21,264.75, 31,886.40 and 12,382.95

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Solution

The fourth proportional to 21,264.75, 31,886.40 and 12,382.95 is: 18,568.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,264.75 : 31,886.40 = 12,382.95 : x
  2. Step 2: Convert to fraction form
    21,264.75/31,886.40 = 12,382.95/x
  3. Step 3: Cross multiply
    21,264.75x = 31,886.40 × 12,382.95
  4. Step 4: Simplify right side
    21,264.75x = 394,847,696.88
  5. Step 5: Solve for x
    x = 394,847,696.88/21,264.75
  6. Step 6: Final answer
    x = 18,568.18

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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.