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Finding the Fourth Proportional to 20,672.98, 30,984.86 and 14,399.02

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Solution

The fourth proportional to 20,672.98, 30,984.86 and 14,399.02 is: 21,581.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,672.98 : 30,984.86 = 14,399.02 : x
  2. Step 2: Convert to fraction form
    20,672.98/30,984.86 = 14,399.02/x
  3. Step 3: Cross multiply
    20,672.98x = 30,984.86 × 14,399.02
  4. Step 4: Simplify right side
    20,672.98x = 446,151,618.84
  5. Step 5: Solve for x
    x = 446,151,618.84/20,672.98
  6. Step 6: Final answer
    x = 21,581.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.