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Finding the Fourth Proportional to 14,879.36, 20,534.16 and 8,912

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Solution

The fourth proportional to 14,879.36, 20,534.16 and 8,912 is: 12,298.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,879.36 : 20,534.16 = 8,912 : x
  2. Step 2: Convert to fraction form
    14,879.36/20,534.16 = 8,912/x
  3. Step 3: Cross multiply
    14,879.36x = 20,534.16 × 8,912
  4. Step 4: Simplify right side
    14,879.36x = 183,000,433.92
  5. Step 5: Solve for x
    x = 183,000,433.92/14,879.36
  6. Step 6: Final answer
    x = 12,298.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.