Home / 13,209.20-18,228.59-7,240.86

Finding the Fourth Proportional to 13,209.20, 18,228.59 and 7,240.86

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Solution

The fourth proportional to 13,209.20, 18,228.59 and 7,240.86 is: 9,992.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,209.20 : 18,228.59 = 7,240.86 : x
  2. Step 2: Convert to fraction form
    13,209.20/18,228.59 = 7,240.86/x
  3. Step 3: Cross multiply
    13,209.20x = 18,228.59 × 7,240.86
  4. Step 4: Simplify right side
    13,209.20x = 131,990,631.98
  5. Step 5: Solve for x
    x = 131,990,631.98/13,209.20
  6. Step 6: Final answer
    x = 9,992.33

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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.