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Finding the Fourth Proportional to 14,502.66, 20,012.72 and 8,128.14

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Solution

The fourth proportional to 14,502.66, 20,012.72 and 8,128.14 is: 11,216.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,502.66 : 20,012.72 = 8,128.14 : x
  2. Step 2: Convert to fraction form
    14,502.66/20,012.72 = 8,128.14/x
  3. Step 3: Cross multiply
    14,502.66x = 20,012.72 × 8,128.14
  4. Step 4: Simplify right side
    14,502.66x = 162,666,189.94
  5. Step 5: Solve for x
    x = 162,666,189.94/14,502.66
  6. Step 6: Final answer
    x = 11,216.30

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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.