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Finding the Fourth Proportional to 12,578.81, 17,358.71 and 6,913.94

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Solution

The fourth proportional to 12,578.81, 17,358.71 and 6,913.94 is: 9,541.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,578.81 : 17,358.71 = 6,913.94 : x
  2. Step 2: Convert to fraction form
    12,578.81/17,358.71 = 6,913.94/x
  3. Step 3: Cross multiply
    12,578.81x = 17,358.71 × 6,913.94
  4. Step 4: Simplify right side
    12,578.81x = 120,016,958.05
  5. Step 5: Solve for x
    x = 120,016,958.05/12,578.81
  6. Step 6: Final answer
    x = 9,541.21

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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.