Home / 21,428.21-29,569.61-11,867.95

Finding the Fourth Proportional to 21,428.21, 29,569.61 and 11,867.95

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Solution

The fourth proportional to 21,428.21, 29,569.61 and 11,867.95 is: 16,377.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,428.21 : 29,569.61 = 11,867.95 : x
  2. Step 2: Convert to fraction form
    21,428.21/29,569.61 = 11,867.95/x
  3. Step 3: Cross multiply
    21,428.21x = 29,569.61 × 11,867.95
  4. Step 4: Simplify right side
    21,428.21x = 350,930,590.50
  5. Step 5: Solve for x
    x = 350,930,590.50/21,428.21
  6. Step 6: Final answer
    x = 16,377.03

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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.