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Finding the Fourth Proportional to 12,673.68, 17,478.36 and 7,958.40

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Solution

The fourth proportional to 12,673.68, 17,478.36 and 7,958.40 is: 10,975.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,673.68 : 17,478.36 = 7,958.40 : x
  2. Step 2: Convert to fraction form
    12,673.68/17,478.36 = 7,958.40/x
  3. Step 3: Cross multiply
    12,673.68x = 17,478.36 × 7,958.40
  4. Step 4: Simplify right side
    12,673.68x = 139,099,780.22
  5. Step 5: Solve for x
    x = 139,099,780.22/12,673.68
  6. Step 6: Final answer
    x = 10,975.48

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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.