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Finding the Fourth Proportional to 14,991.76, 20,691.12 and 14,327.44

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Solution

The fourth proportional to 14,991.76, 20,691.12 and 14,327.44 is: 19,774.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,991.76 : 20,691.12 = 14,327.44 : x
  2. Step 2: Convert to fraction form
    14,991.76/20,691.12 = 14,327.44/x
  3. Step 3: Cross multiply
    14,991.76x = 20,691.12 × 14,327.44
  4. Step 4: Simplify right side
    14,991.76x = 296,450,780.33
  5. Step 5: Solve for x
    x = 296,450,780.33/14,991.76
  6. Step 6: Final answer
    x = 19,774.25

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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.