Home / 20,613.42-28,446.57-11,181.98

Finding the Fourth Proportional to 20,613.42, 28,446.57 and 11,181.98

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Solution

The fourth proportional to 20,613.42, 28,446.57 and 11,181.98 is: 15,431.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,613.42 : 28,446.57 = 11,181.98 : x
  2. Step 2: Convert to fraction form
    20,613.42/28,446.57 = 11,181.98/x
  3. Step 3: Cross multiply
    20,613.42x = 28,446.57 × 11,181.98
  4. Step 4: Simplify right side
    20,613.42x = 318,089,047.93
  5. Step 5: Solve for x
    x = 318,089,047.93/20,613.42
  6. Step 6: Final answer
    x = 15,431.16

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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.