Home / 13,440.60-18,540.94-7,986.56

Finding the Fourth Proportional to 13,440.60, 18,540.94 and 7,986.56

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Solution

The fourth proportional to 13,440.60, 18,540.94 and 7,986.56 is: 11,017.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,440.60 : 18,540.94 = 7,986.56 : x
  2. Step 2: Convert to fraction form
    13,440.60/18,540.94 = 7,986.56/x
  3. Step 3: Cross multiply
    13,440.60x = 18,540.94 × 7,986.56
  4. Step 4: Simplify right side
    13,440.60x = 148,078,329.77
  5. Step 5: Solve for x
    x = 148,078,329.77/13,440.60
  6. Step 6: Final answer
    x = 11,017.24

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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.