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Finding the Fourth Proportional to 14,991.56, 20,690.18 and 8,703.94

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Solution

The fourth proportional to 14,991.56, 20,690.18 and 8,703.94 is: 12,012.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,991.56 : 20,690.18 = 8,703.94 : x
  2. Step 2: Convert to fraction form
    14,991.56/20,690.18 = 8,703.94/x
  3. Step 3: Cross multiply
    14,991.56x = 20,690.18 × 8,703.94
  4. Step 4: Simplify right side
    14,991.56x = 180,086,022.70
  5. Step 5: Solve for x
    x = 180,086,022.70/14,991.56
  6. Step 6: Final answer
    x = 12,012.49

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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.