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Finding the Fourth Proportional to 13,405.68, 18,500.68 and 7,741.48

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Solution

The fourth proportional to 13,405.68, 18,500.68 and 7,741.48 is: 10,683.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,405.68 : 18,500.68 = 7,741.48 : x
  2. Step 2: Convert to fraction form
    13,405.68/18,500.68 = 7,741.48/x
  3. Step 3: Cross multiply
    13,405.68x = 18,500.68 × 7,741.48
  4. Step 4: Simplify right side
    13,405.68x = 143,222,644.21
  5. Step 5: Solve for x
    x = 143,222,644.21/13,405.68
  6. Step 6: Final answer
    x = 10,683.73

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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.