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Finding the Fourth Proportional to 13,994.52, 20,991.43 and 5,672.31

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Solution

The fourth proportional to 13,994.52, 20,991.43 and 5,672.31 is: 8,508.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,994.52 : 20,991.43 = 5,672.31 : x
  2. Step 2: Convert to fraction form
    13,994.52/20,991.43 = 5,672.31/x
  3. Step 3: Cross multiply
    13,994.52x = 20,991.43 × 5,672.31
  4. Step 4: Simplify right side
    13,994.52x = 119,069,898.30
  5. Step 5: Solve for x
    x = 119,069,898.30/13,994.52
  6. Step 6: Final answer
    x = 8,508.32

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1.5x scale

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.