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Finding the Fourth Proportional to 15,991.44, 22,065.60 and 8,917.68

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Solution

The fourth proportional to 15,991.44, 22,065.60 and 8,917.68 is: 12,304.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,991.44 : 22,065.60 = 8,917.68 : x
  2. Step 2: Convert to fraction form
    15,991.44/22,065.60 = 8,917.68/x
  3. Step 3: Cross multiply
    15,991.44x = 22,065.60 × 8,917.68
  4. Step 4: Simplify right side
    15,991.44x = 196,773,959.81
  5. Step 5: Solve for x
    x = 196,773,959.81/15,991.44
  6. Step 6: Final answer
    x = 12,304.96

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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.