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Finding the Fourth Proportional to 13,311.42, 18,361.86 and 8,598.42

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Solution

The fourth proportional to 13,311.42, 18,361.86 and 8,598.42 is: 11,860.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,311.42 : 18,361.86 = 8,598.42 : x
  2. Step 2: Convert to fraction form
    13,311.42/18,361.86 = 8,598.42/x
  3. Step 3: Cross multiply
    13,311.42x = 18,361.86 × 8,598.42
  4. Step 4: Simplify right side
    13,311.42x = 157,882,984.26
  5. Step 5: Solve for x
    x = 157,882,984.26/13,311.42
  6. Step 6: Final answer
    x = 11,860.72

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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.