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Finding the Fourth Proportional to 28,349.82, 42,512.43 and 8,623.77

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Solution

The fourth proportional to 28,349.82, 42,512.43 and 8,623.77 is: 12,931.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,349.82 : 42,512.43 = 8,623.77 : x
  2. Step 2: Convert to fraction form
    28,349.82/42,512.43 = 8,623.77/x
  3. Step 3: Cross multiply
    28,349.82x = 42,512.43 × 8,623.77
  4. Step 4: Simplify right side
    28,349.82x = 366,617,418.46
  5. Step 5: Solve for x
    x = 366,617,418.46/28,349.82
  6. Step 6: Final answer
    x = 12,931.91

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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.