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Finding the Fourth Proportional to 13,610.81, 18,784.94 and 8,308.70

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Solution

The fourth proportional to 13,610.81, 18,784.94 and 8,308.70 is: 11,467.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,610.81 : 18,784.94 = 8,308.70 : x
  2. Step 2: Convert to fraction form
    13,610.81/18,784.94 = 8,308.70/x
  3. Step 3: Cross multiply
    13,610.81x = 18,784.94 × 8,308.70
  4. Step 4: Simplify right side
    13,610.81x = 156,078,295.51
  5. Step 5: Solve for x
    x = 156,078,295.51/13,610.81
  6. Step 6: Final answer
    x = 11,467.23

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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.