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Finding the Fourth Proportional to 14,539.36, 20,064 and 8,490.64

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Solution

The fourth proportional to 14,539.36, 20,064 and 8,490.64 is: 11,716.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,539.36 : 20,064 = 8,490.64 : x
  2. Step 2: Convert to fraction form
    14,539.36/20,064 = 8,490.64/x
  3. Step 3: Cross multiply
    14,539.36x = 20,064 × 8,490.64
  4. Step 4: Simplify right side
    14,539.36x = 170,356,200.96
  5. Step 5: Solve for x
    x = 170,356,200.96/14,539.36
  6. Step 6: Final answer
    x = 11,716.90

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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.