Home / 21,619.40-29,830.92-12,187.95

Finding the Fourth Proportional to 21,619.40, 29,830.92 and 12,187.95

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Solution

The fourth proportional to 21,619.40, 29,830.92 and 12,187.95 is: 16,817.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,619.40 : 29,830.92 = 12,187.95 : x
  2. Step 2: Convert to fraction form
    21,619.40/29,830.92 = 12,187.95/x
  3. Step 3: Cross multiply
    21,619.40x = 29,830.92 × 12,187.95
  4. Step 4: Simplify right side
    21,619.40x = 363,577,761.41
  5. Step 5: Solve for x
    x = 363,577,761.41/21,619.40
  6. Step 6: Final answer
    x = 16,817.20

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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.