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Finding the Fourth Proportional to 13,591.68, 20,361.16 and 7,955.68

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Solution

The fourth proportional to 13,591.68, 20,361.16 and 7,955.68 is: 11,918.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,591.68 : 20,361.16 = 7,955.68 : x
  2. Step 2: Convert to fraction form
    13,591.68/20,361.16 = 7,955.68/x
  3. Step 3: Cross multiply
    13,591.68x = 20,361.16 × 7,955.68
  4. Step 4: Simplify right side
    13,591.68x = 161,986,873.39
  5. Step 5: Solve for x
    x = 161,986,873.39/13,591.68
  6. Step 6: Final answer
    x = 11,918.09

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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.