Home / 21,418.60-32,118.30-9,725.80

Finding the Fourth Proportional to 21,418.60, 32,118.30 and 9,725.80

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Solution

The fourth proportional to 21,418.60, 32,118.30 and 9,725.80 is: 14,584.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,418.60 : 32,118.30 = 9,725.80 : x
  2. Step 2: Convert to fraction form
    21,418.60/32,118.30 = 9,725.80/x
  3. Step 3: Cross multiply
    21,418.60x = 32,118.30 × 9,725.80
  4. Step 4: Simplify right side
    21,418.60x = 312,376,162.14
  5. Step 5: Solve for x
    x = 312,376,162.14/21,418.60
  6. Step 6: Final answer
    x = 14,584.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.