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Finding the Fourth Proportional to 13,583.71, 18,745.91 and 7,615.48

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Solution

The fourth proportional to 13,583.71, 18,745.91 and 7,615.48 is: 10,509.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,583.71 : 18,745.91 = 7,615.48 : x
  2. Step 2: Convert to fraction form
    13,583.71/18,745.91 = 7,615.48/x
  3. Step 3: Cross multiply
    13,583.71x = 18,745.91 × 7,615.48
  4. Step 4: Simplify right side
    13,583.71x = 142,759,121.73
  5. Step 5: Solve for x
    x = 142,759,121.73/13,583.71
  6. Step 6: Final answer
    x = 10,509.58

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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.