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Finding the Fourth Proportional to 13,616.91, 18,792 and 7,951.57

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Solution

The fourth proportional to 13,616.91, 18,792 and 7,951.57 is: 10,973.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,616.91 : 18,792 = 7,951.57 : x
  2. Step 2: Convert to fraction form
    13,616.91/18,792 = 7,951.57/x
  3. Step 3: Cross multiply
    13,616.91x = 18,792 × 7,951.57
  4. Step 4: Simplify right side
    13,616.91x = 149,425,856.46
  5. Step 5: Solve for x
    x = 149,425,856.46/13,616.91
  6. Step 6: Final answer
    x = 10,973.55

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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.