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Finding the Fourth Proportional to 13,487.45, 18,611.51 and 7,519.01

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Solution

The fourth proportional to 13,487.45, 18,611.51 and 7,519.01 is: 10,375.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,487.45 : 18,611.51 = 7,519.01 : x
  2. Step 2: Convert to fraction form
    13,487.45/18,611.51 = 7,519.01/x
  3. Step 3: Cross multiply
    13,487.45x = 18,611.51 × 7,519.01
  4. Step 4: Simplify right side
    13,487.45x = 139,939,999.15
  5. Step 5: Solve for x
    x = 139,939,999.15/13,487.45
  6. Step 6: Final answer
    x = 10,375.58

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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.