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Finding the Fourth Proportional to 13,766.50, 18,997.86 and 7,478.92

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Solution

The fourth proportional to 13,766.50, 18,997.86 and 7,478.92 is: 10,320.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,766.50 : 18,997.86 = 7,478.92 : x
  2. Step 2: Convert to fraction form
    13,766.50/18,997.86 = 7,478.92/x
  3. Step 3: Cross multiply
    13,766.50x = 18,997.86 × 7,478.92
  4. Step 4: Simplify right side
    13,766.50x = 142,083,475.11
  5. Step 5: Solve for x
    x = 142,083,475.11/13,766.50
  6. Step 6: Final answer
    x = 10,320.96

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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.