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Finding the Fourth Proportional to 21,450.88, 32,187.84 and 9,136

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Solution

The fourth proportional to 21,450.88, 32,187.84 and 9,136 is: 13,708.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,450.88 : 32,187.84 = 9,136 : x
  2. Step 2: Convert to fraction form
    21,450.88/32,187.84 = 9,136/x
  3. Step 3: Cross multiply
    21,450.88x = 32,187.84 × 9,136
  4. Step 4: Simplify right side
    21,450.88x = 294,068,106.24
  5. Step 5: Solve for x
    x = 294,068,106.24/21,450.88
  6. Step 6: Final answer
    x = 13,708.91

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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.