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Finding the Fourth Proportional to 13,687.95, 18,892.41 and 8,899.56

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Solution

The fourth proportional to 13,687.95, 18,892.41 and 8,899.56 is: 12,283.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,687.95 : 18,892.41 = 8,899.56 : x
  2. Step 2: Convert to fraction form
    13,687.95/18,892.41 = 8,899.56/x
  3. Step 3: Cross multiply
    13,687.95x = 18,892.41 × 8,899.56
  4. Step 4: Simplify right side
    13,687.95x = 168,134,136.34
  5. Step 5: Solve for x
    x = 168,134,136.34/13,687.95
  6. Step 6: Final answer
    x = 12,283.37

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1.5x scale

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.