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Finding the Fourth Proportional to 28,355.88, 42,532.38 and 8,634

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Solution

The fourth proportional to 28,355.88, 42,532.38 and 8,634 is: 12,950.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,355.88 : 42,532.38 = 8,634 : x
  2. Step 2: Convert to fraction form
    28,355.88/42,532.38 = 8,634/x
  3. Step 3: Cross multiply
    28,355.88x = 42,532.38 × 8,634
  4. Step 4: Simplify right side
    28,355.88x = 367,224,568.92
  5. Step 5: Solve for x
    x = 367,224,568.92/28,355.88
  6. Step 6: Final answer
    x = 12,950.56

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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.