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Finding the Fourth Proportional to 13,383.79, 18,478.11 and 8,605.96

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Solution

The fourth proportional to 13,383.79, 18,478.11 and 8,605.96 is: 11,881.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,383.79 : 18,478.11 = 8,605.96 : x
  2. Step 2: Convert to fraction form
    13,383.79/18,478.11 = 8,605.96/x
  3. Step 3: Cross multiply
    13,383.79x = 18,478.11 × 8,605.96
  4. Step 4: Simplify right side
    13,383.79x = 159,021,875.54
  5. Step 5: Solve for x
    x = 159,021,875.54/13,383.79
  6. Step 6: Final answer
    x = 11,881.68

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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.