Home / 21,406.92-29,511.90-18,454.20

Finding the Fourth Proportional to 21,406.92, 29,511.90 and 18,454.20

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Solution

The fourth proportional to 21,406.92, 29,511.90 and 18,454.20 is: 25,441.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,406.92 : 29,511.90 = 18,454.20 : x
  2. Step 2: Convert to fraction form
    21,406.92/29,511.90 = 18,454.20/x
  3. Step 3: Cross multiply
    21,406.92x = 29,511.90 × 18,454.20
  4. Step 4: Simplify right side
    21,406.92x = 544,618,504.98
  5. Step 5: Solve for x
    x = 544,618,504.98/21,406.92
  6. Step 6: Final answer
    x = 25,441.24

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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.