Home / 21,376.72-32,079.66-12,835.36

Finding the Fourth Proportional to 21,376.72, 32,079.66 and 12,835.36

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Solution

The fourth proportional to 21,376.72, 32,079.66 and 12,835.36 is: 19,261.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,376.72 : 32,079.66 = 12,835.36 : x
  2. Step 2: Convert to fraction form
    21,376.72/32,079.66 = 12,835.36/x
  3. Step 3: Cross multiply
    21,376.72x = 32,079.66 × 12,835.36
  4. Step 4: Simplify right side
    21,376.72x = 411,753,984.78
  5. Step 5: Solve for x
    x = 411,753,984.78/21,376.72
  6. Step 6: Final answer
    x = 19,261.79

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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.