Home / 21,829.88-32,721.50-12,449.70

Finding the Fourth Proportional to 21,829.88, 32,721.50 and 12,449.70

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Solution

The fourth proportional to 21,829.88, 32,721.50 and 12,449.70 is: 18,661.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,829.88 : 32,721.50 = 12,449.70 : x
  2. Step 2: Convert to fraction form
    21,829.88/32,721.50 = 12,449.70/x
  3. Step 3: Cross multiply
    21,829.88x = 32,721.50 × 12,449.70
  4. Step 4: Simplify right side
    21,829.88x = 407,372,889.67
  5. Step 5: Solve for x
    x = 407,372,889.67/21,829.88
  6. Step 6: Final answer
    x = 18,661.25

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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.