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Finding the Fourth Proportional to 19,361.28, 28,995.84 and 11,136

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Solution

The fourth proportional to 19,361.28, 28,995.84 and 11,136 is: 16,677.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,361.28 : 28,995.84 = 11,136 : x
  2. Step 2: Convert to fraction form
    19,361.28/28,995.84 = 11,136/x
  3. Step 3: Cross multiply
    19,361.28x = 28,995.84 × 11,136
  4. Step 4: Simplify right side
    19,361.28x = 322,897,674.24
  5. Step 5: Solve for x
    x = 322,897,674.24/19,361.28
  6. Step 6: Final answer
    x = 16,677.50

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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.