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Finding the Fourth Proportional to 12,578.92, 17,359.01 and 6,913.78

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Solution

The fourth proportional to 12,578.92, 17,359.01 and 6,913.78 is: 9,541.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,578.92 : 17,359.01 = 6,913.78 : x
  2. Step 2: Convert to fraction form
    12,578.92/17,359.01 = 6,913.78/x
  3. Step 3: Cross multiply
    12,578.92x = 17,359.01 × 6,913.78
  4. Step 4: Simplify right side
    12,578.92x = 120,016,376.16
  5. Step 5: Solve for x
    x = 120,016,376.16/12,578.92
  6. Step 6: Final answer
    x = 9,541.07

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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.