Home / 13,208.20-18,227.12-7,239.88

Finding the Fourth Proportional to 13,208.20, 18,227.12 and 7,239.88

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Solution

The fourth proportional to 13,208.20, 18,227.12 and 7,239.88 is: 9,990.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,208.20 : 18,227.12 = 7,239.88 : x
  2. Step 2: Convert to fraction form
    13,208.20/18,227.12 = 7,239.88/x
  3. Step 3: Cross multiply
    13,208.20x = 18,227.12 × 7,239.88
  4. Step 4: Simplify right side
    13,208.20x = 131,962,161.55
  5. Step 5: Solve for x
    x = 131,962,161.55/13,208.20
  6. Step 6: Final answer
    x = 9,990.93

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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.