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Finding the Fourth Proportional to 14,958.08, 20,642 and 8,989.60

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Solution

The fourth proportional to 14,958.08, 20,642 and 8,989.60 is: 12,405.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,958.08 : 20,642 = 8,989.60 : x
  2. Step 2: Convert to fraction form
    14,958.08/20,642 = 8,989.60/x
  3. Step 3: Cross multiply
    14,958.08x = 20,642 × 8,989.60
  4. Step 4: Simplify right side
    14,958.08x = 185,563,323.20
  5. Step 5: Solve for x
    x = 185,563,323.20/14,958.08
  6. Step 6: Final answer
    x = 12,405.56

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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.