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Finding the Fourth Proportional to 13,483.78, 18,608.26 and 7,515.49

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Solution

The fourth proportional to 13,483.78, 18,608.26 and 7,515.49 is: 10,371.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,483.78 : 18,608.26 = 7,515.49 : x
  2. Step 2: Convert to fraction form
    13,483.78/18,608.26 = 7,515.49/x
  3. Step 3: Cross multiply
    13,483.78x = 18,608.26 × 7,515.49
  4. Step 4: Simplify right side
    13,483.78x = 139,850,154.37
  5. Step 5: Solve for x
    x = 139,850,154.37/13,483.78
  6. Step 6: Final answer
    x = 10,371.73

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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.