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Finding the Fourth Proportional to 12,668.42, 18,984.08 and 7,132.56

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Solution

The fourth proportional to 12,668.42, 18,984.08 and 7,132.56 is: 10,688.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,668.42 : 18,984.08 = 7,132.56 : x
  2. Step 2: Convert to fraction form
    12,668.42/18,984.08 = 7,132.56/x
  3. Step 3: Cross multiply
    12,668.42x = 18,984.08 × 7,132.56
  4. Step 4: Simplify right side
    12,668.42x = 135,405,089.64
  5. Step 5: Solve for x
    x = 135,405,089.64/12,668.42
  6. Step 6: Final answer
    x = 10,688.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.