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Finding the Fourth Proportional to 12,785.92, 19,179.92 and 3,551.92

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Solution

The fourth proportional to 12,785.92, 19,179.92 and 3,551.92 is: 5,328.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,785.92 : 19,179.92 = 3,551.92 : x
  2. Step 2: Convert to fraction form
    12,785.92/19,179.92 = 3,551.92/x
  3. Step 3: Cross multiply
    12,785.92x = 19,179.92 × 3,551.92
  4. Step 4: Simplify right side
    12,785.92x = 68,125,541.45
  5. Step 5: Solve for x
    x = 68,125,541.45/12,785.92
  6. Step 6: Final answer
    x = 5,328.17

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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.