Home / 21,179.40-29,224.42-12,679.53

Finding the Fourth Proportional to 21,179.40, 29,224.42 and 12,679.53

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Solution

The fourth proportional to 21,179.40, 29,224.42 and 12,679.53 is: 17,495.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,179.40 : 29,224.42 = 12,679.53 : x
  2. Step 2: Convert to fraction form
    21,179.40/29,224.42 = 12,679.53/x
  3. Step 3: Cross multiply
    21,179.40x = 29,224.42 × 12,679.53
  4. Step 4: Simplify right side
    21,179.40x = 370,551,910.12
  5. Step 5: Solve for x
    x = 370,551,910.12/21,179.40
  6. Step 6: Final answer
    x = 17,495.86

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1.5x scale

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.