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Finding the Fourth Proportional to 12,383.65, 18,477.95 and 11,630.28

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Solution

The fourth proportional to 12,383.65, 18,477.95 and 11,630.28 is: 17,353.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,383.65 : 18,477.95 = 11,630.28 : x
  2. Step 2: Convert to fraction form
    12,383.65/18,477.95 = 11,630.28/x
  3. Step 3: Cross multiply
    12,383.65x = 18,477.95 × 11,630.28
  4. Step 4: Simplify right side
    12,383.65x = 214,903,732.33
  5. Step 5: Solve for x
    x = 214,903,732.33/12,383.65
  6. Step 6: Final answer
    x = 17,353.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.