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Finding the Fourth Proportional to 28,411.49, 42,619.03 and 11,772.84

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Solution

The fourth proportional to 28,411.49, 42,619.03 and 11,772.84 is: 17,660.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,411.49 : 42,619.03 = 11,772.84 : x
  2. Step 2: Convert to fraction form
    28,411.49/42,619.03 = 11,772.84/x
  3. Step 3: Cross multiply
    28,411.49x = 42,619.03 × 11,772.84
  4. Step 4: Simplify right side
    28,411.49x = 501,747,151.53
  5. Step 5: Solve for x
    x = 501,747,151.53/28,411.49
  6. Step 6: Final answer
    x = 17,660.01

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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.