Home / 13,361.40-18,438.60-7,986.30

Finding the Fourth Proportional to 13,361.40, 18,438.60 and 7,986.30

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Solution

The fourth proportional to 13,361.40, 18,438.60 and 7,986.30 is: 11,021.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,361.40 : 18,438.60 = 7,986.30 : x
  2. Step 2: Convert to fraction form
    13,361.40/18,438.60 = 7,986.30/x
  3. Step 3: Cross multiply
    13,361.40x = 18,438.60 × 7,986.30
  4. Step 4: Simplify right side
    13,361.40x = 147,256,191.18
  5. Step 5: Solve for x
    x = 147,256,191.18/13,361.40
  6. Step 6: Final answer
    x = 11,021.02

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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.