Home / 13,218.52-18,238.80-8,972.86

Finding the Fourth Proportional to 13,218.52, 18,238.80 and 8,972.86

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Solution

The fourth proportional to 13,218.52, 18,238.80 and 8,972.86 is: 12,380.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,218.52 : 18,238.80 = 8,972.86 : x
  2. Step 2: Convert to fraction form
    13,218.52/18,238.80 = 8,972.86/x
  3. Step 3: Cross multiply
    13,218.52x = 18,238.80 × 8,972.86
  4. Step 4: Simplify right side
    13,218.52x = 163,654,198.97
  5. Step 5: Solve for x
    x = 163,654,198.97/13,218.52
  6. Step 6: Final answer
    x = 12,380.67

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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.