Home / 13,221.24-18,238.95-7,629

Finding the Fourth Proportional to 13,221.24, 18,238.95 and 7,629

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Solution

The fourth proportional to 13,221.24, 18,238.95 and 7,629 is: 10,524.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,221.24 : 18,238.95 = 7,629 : x
  2. Step 2: Convert to fraction form
    13,221.24/18,238.95 = 7,629/x
  3. Step 3: Cross multiply
    13,221.24x = 18,238.95 × 7,629
  4. Step 4: Simplify right side
    13,221.24x = 139,144,949.55
  5. Step 5: Solve for x
    x = 139,144,949.55/13,221.24
  6. Step 6: Final answer
    x = 10,524.35

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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.