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Finding the Fourth Proportional to 14,989.94, 20,686 and 8,275.56

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Solution

The fourth proportional to 14,989.94, 20,686 and 8,275.56 is: 11,420.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,989.94 : 20,686 = 8,275.56 : x
  2. Step 2: Convert to fraction form
    14,989.94/20,686 = 8,275.56/x
  3. Step 3: Cross multiply
    14,989.94x = 20,686 × 8,275.56
  4. Step 4: Simplify right side
    14,989.94x = 171,188,234.16
  5. Step 5: Solve for x
    x = 171,188,234.16/14,989.94
  6. Step 6: Final answer
    x = 11,420.21

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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.