Home / 13,208.21-18,227.79-7,239.87

Finding the Fourth Proportional to 13,208.21, 18,227.79 and 7,239.87

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Solution

The fourth proportional to 13,208.21, 18,227.79 and 7,239.87 is: 9,991.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,208.21 : 18,227.79 = 7,239.87 : x
  2. Step 2: Convert to fraction form
    13,208.21/18,227.79 = 7,239.87/x
  3. Step 3: Cross multiply
    13,208.21x = 18,227.79 × 7,239.87
  4. Step 4: Simplify right side
    13,208.21x = 131,966,829.99
  5. Step 5: Solve for x
    x = 131,966,829.99/13,208.21
  6. Step 6: Final answer
    x = 9,991.28

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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.