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Finding the Fourth Proportional to 14,713.62, 20,305.62 and 8,428.02

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Solution

The fourth proportional to 14,713.62, 20,305.62 and 8,428.02 is: 11,631.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,713.62 : 20,305.62 = 8,428.02 : x
  2. Step 2: Convert to fraction form
    14,713.62/20,305.62 = 8,428.02/x
  3. Step 3: Cross multiply
    14,713.62x = 20,305.62 × 8,428.02
  4. Step 4: Simplify right side
    14,713.62x = 171,136,171.47
  5. Step 5: Solve for x
    x = 171,136,171.47/14,713.62
  6. Step 6: Final answer
    x = 11,631.14

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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.