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Finding the Fourth Proportional to 28,323.46, 42,491.40 and 13,512

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Solution

The fourth proportional to 28,323.46, 42,491.40 and 13,512 is: 20,270.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,323.46 : 42,491.40 = 13,512 : x
  2. Step 2: Convert to fraction form
    28,323.46/42,491.40 = 13,512/x
  3. Step 3: Cross multiply
    28,323.46x = 42,491.40 × 13,512
  4. Step 4: Simplify right side
    28,323.46x = 574,143,796.80
  5. Step 5: Solve for x
    x = 574,143,796.80/28,323.46
  6. Step 6: Final answer
    x = 20,270.96

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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.