Home / 21,327.60-31,991.56-8,176.84

Finding the Fourth Proportional to 21,327.60, 31,991.56 and 8,176.84

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Solution

The fourth proportional to 21,327.60, 31,991.56 and 8,176.84 is: 12,265.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,327.60 : 31,991.56 = 8,176.84 : x
  2. Step 2: Convert to fraction form
    21,327.60/31,991.56 = 8,176.84/x
  3. Step 3: Cross multiply
    21,327.60x = 31,991.56 × 8,176.84
  4. Step 4: Simplify right side
    21,327.60x = 261,589,867.47
  5. Step 5: Solve for x
    x = 261,589,867.47/21,327.60
  6. Step 6: Final answer
    x = 12,265.32

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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.