Home / 21,835.20-32,721.53-12,455.82

Finding the Fourth Proportional to 21,835.20, 32,721.53 and 12,455.82

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Solution

The fourth proportional to 21,835.20, 32,721.53 and 12,455.82 is: 18,665.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,835.20 : 32,721.53 = 12,455.82 : x
  2. Step 2: Convert to fraction form
    21,835.20/32,721.53 = 12,455.82/x
  3. Step 3: Cross multiply
    21,835.20x = 32,721.53 × 12,455.82
  4. Step 4: Simplify right side
    21,835.20x = 407,573,425.53
  5. Step 5: Solve for x
    x = 407,573,425.53/21,835.20
  6. Step 6: Final answer
    x = 18,665.89

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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.