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Finding the Fourth Proportional to 14,502.21, 20,014.65 and 8,129.85

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Solution

The fourth proportional to 14,502.21, 20,014.65 and 8,129.85 is: 11,220.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,502.21 : 20,014.65 = 8,129.85 : x
  2. Step 2: Convert to fraction form
    14,502.21/20,014.65 = 8,129.85/x
  3. Step 3: Cross multiply
    14,502.21x = 20,014.65 × 8,129.85
  4. Step 4: Simplify right side
    14,502.21x = 162,716,102.30
  5. Step 5: Solve for x
    x = 162,716,102.30/14,502.21
  6. Step 6: Final answer
    x = 11,220.09

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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.