Home / 13,217.36-18,239.28-7,628

Finding the Fourth Proportional to 13,217.36, 18,239.28 and 7,628

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Solution

The fourth proportional to 13,217.36, 18,239.28 and 7,628 is: 10,526.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,217.36 : 18,239.28 = 7,628 : x
  2. Step 2: Convert to fraction form
    13,217.36/18,239.28 = 7,628/x
  3. Step 3: Cross multiply
    13,217.36x = 18,239.28 × 7,628
  4. Step 4: Simplify right side
    13,217.36x = 139,129,227.84
  5. Step 5: Solve for x
    x = 139,129,227.84/13,217.36
  6. Step 6: Final answer
    x = 10,526.25

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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.