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Finding the Fourth Proportional to 14,863.57, 20,511.89 and 8,491.01

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Solution

The fourth proportional to 14,863.57, 20,511.89 and 8,491.01 is: 11,717.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,863.57 : 20,511.89 = 8,491.01 : x
  2. Step 2: Convert to fraction form
    14,863.57/20,511.89 = 8,491.01/x
  3. Step 3: Cross multiply
    14,863.57x = 20,511.89 × 8,491.01
  4. Step 4: Simplify right side
    14,863.57x = 174,166,560.55
  5. Step 5: Solve for x
    x = 174,166,560.55/14,863.57
  6. Step 6: Final answer
    x = 11,717.68

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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.