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Finding the Fourth Proportional to 13,486.92, 18,611.74 and 7,518.56

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Solution

The fourth proportional to 13,486.92, 18,611.74 and 7,518.56 is: 10,375.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,486.92 : 18,611.74 = 7,518.56 : x
  2. Step 2: Convert to fraction form
    13,486.92/18,611.74 = 7,518.56/x
  3. Step 3: Cross multiply
    13,486.92x = 18,611.74 × 7,518.56
  4. Step 4: Simplify right side
    13,486.92x = 139,933,483.89
  5. Step 5: Solve for x
    x = 139,933,483.89/13,486.92
  6. Step 6: Final answer
    x = 10,375.50

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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.