Home / 21,385.68-29,512.50-11,954.40

Finding the Fourth Proportional to 21,385.68, 29,512.50 and 11,954.40

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Solution

The fourth proportional to 21,385.68, 29,512.50 and 11,954.40 is: 16,497.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,385.68 : 29,512.50 = 11,954.40 : x
  2. Step 2: Convert to fraction form
    21,385.68/29,512.50 = 11,954.40/x
  3. Step 3: Cross multiply
    21,385.68x = 29,512.50 × 11,954.40
  4. Step 4: Simplify right side
    21,385.68x = 352,804,230
  5. Step 5: Solve for x
    x = 352,804,230/21,385.68
  6. Step 6: Final answer
    x = 16,497.22

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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.