Home / 21,427.49-29,560.11-13,876.25

Finding the Fourth Proportional to 21,427.49, 29,560.11 and 13,876.25

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Solution

The fourth proportional to 21,427.49, 29,560.11 and 13,876.25 is: 19,142.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,427.49 : 29,560.11 = 13,876.25 : x
  2. Step 2: Convert to fraction form
    21,427.49/29,560.11 = 13,876.25/x
  3. Step 3: Cross multiply
    21,427.49x = 29,560.11 × 13,876.25
  4. Step 4: Simplify right side
    21,427.49x = 410,183,439.44
  5. Step 5: Solve for x
    x = 410,183,439.44/21,427.49
  6. Step 6: Final answer
    x = 19,142.86

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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.