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Finding the Fourth Proportional to 14,311.55, 19,749.94 and 8,722.55

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Solution

The fourth proportional to 14,311.55, 19,749.94 and 8,722.55 is: 12,037.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,311.55 : 19,749.94 = 8,722.55 : x
  2. Step 2: Convert to fraction form
    14,311.55/19,749.94 = 8,722.55/x
  3. Step 3: Cross multiply
    14,311.55x = 19,749.94 × 8,722.55
  4. Step 4: Simplify right side
    14,311.55x = 172,269,866.72
  5. Step 5: Solve for x
    x = 172,269,866.72/14,311.55
  6. Step 6: Final answer
    x = 12,037.12

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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.